Home / 642,824.50-887,038.17-356,320.21

Finding the Fourth Proportional to 642,824.50, 887,038.17 and 356,320.21

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Solution

The fourth proportional to 642,824.50, 887,038.17 and 356,320.21 is: 491,688.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,824.50 : 887,038.17 = 356,320.21 : x
  2. Step 2: Convert to fraction form
    642,824.50/887,038.17 = 356,320.21/x
  3. Step 3: Cross multiply
    642,824.50x = 887,038.17 × 356,320.21
  4. Step 4: Simplify right side
    642,824.50x = 316,069,627,012.42
  5. Step 5: Solve for x
    x = 316,069,627,012.42/642,824.50
  6. Step 6: Final answer
    x = 491,688.83

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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.