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Finding the Fourth Proportional to 461,087.76, 636,299.85 and 257,138.90

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Solution

The fourth proportional to 461,087.76, 636,299.85 and 257,138.90 is: 354,850.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,087.76 : 636,299.85 = 257,138.90 : x
  2. Step 2: Convert to fraction form
    461,087.76/636,299.85 = 257,138.90/x
  3. Step 3: Cross multiply
    461,087.76x = 636,299.85 × 257,138.90
  4. Step 4: Simplify right side
    461,087.76x = 163,617,443,499.17
  5. Step 5: Solve for x
    x = 163,617,443,499.17/461,087.76
  6. Step 6: Final answer
    x = 354,850.98

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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.