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Finding the Fourth Proportional to 571,803.40, 857,705.10 and 256,875.40

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Solution

The fourth proportional to 571,803.40, 857,705.10 and 256,875.40 is: 385,313.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,803.40 : 857,705.10 = 256,875.40 : x
  2. Step 2: Convert to fraction form
    571,803.40/857,705.10 = 256,875.40/x
  3. Step 3: Cross multiply
    571,803.40x = 857,705.10 × 256,875.40
  4. Step 4: Simplify right side
    571,803.40x = 220,323,340,644.54
  5. Step 5: Solve for x
    x = 220,323,340,644.54/571,803.40
  6. Step 6: Final answer
    x = 385,313.10

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Half scale
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Double scale
Find fourth proportional to 571,804.40, 857,706.60 and 256,876.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.