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Finding the Fourth Proportional to 571,813.40, 857,720.10 and 256,885.40

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Solution

The fourth proportional to 571,813.40, 857,720.10 and 256,885.40 is: 385,328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,813.40 : 857,720.10 = 256,885.40 : x
  2. Step 2: Convert to fraction form
    571,813.40/857,720.10 = 256,885.40/x
  3. Step 3: Cross multiply
    571,813.40x = 857,720.10 × 256,885.40
  4. Step 4: Simplify right side
    571,813.40x = 220,335,770,976.54
  5. Step 5: Solve for x
    x = 220,335,770,976.54/571,813.40
  6. Step 6: Final answer
    x = 385,328.10

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Double scale
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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.