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Finding the Fourth Proportional to 536,935.40, 805,403.10 and 256,999.40

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Solution

The fourth proportional to 536,935.40, 805,403.10 and 256,999.40 is: 385,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,935.40 : 805,403.10 = 256,999.40 : x
  2. Step 2: Convert to fraction form
    536,935.40/805,403.10 = 256,999.40/x
  3. Step 3: Cross multiply
    536,935.40x = 805,403.10 × 256,999.40
  4. Step 4: Simplify right side
    536,935.40x = 206,988,113,458.14
  5. Step 5: Solve for x
    x = 206,988,113,458.14/536,935.40
  6. Step 6: Final answer
    x = 385,499.10

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Half scale
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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.