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Finding the Fourth Proportional to 657,787.90, 907,750.11 and 355,981.90

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Solution

The fourth proportional to 657,787.90, 907,750.11 and 355,981.90 is: 491,256.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,787.90 : 907,750.11 = 355,981.90 : x
  2. Step 2: Convert to fraction form
    657,787.90/907,750.11 = 355,981.90/x
  3. Step 3: Cross multiply
    657,787.90x = 907,750.11 × 355,981.90
  4. Step 4: Simplify right side
    657,787.90x = 323,142,608,883.01
  5. Step 5: Solve for x
    x = 323,142,608,883.01/657,787.90
  6. Step 6: Final answer
    x = 491,256.54

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.