Home / 642,824.75-887,038.49-356,320.46

Finding the Fourth Proportional to 642,824.75, 887,038.49 and 356,320.46

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Solution

The fourth proportional to 642,824.75, 887,038.49 and 356,320.46 is: 491,689.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,824.75 : 887,038.49 = 356,320.46 : x
  2. Step 2: Convert to fraction form
    642,824.75/887,038.49 = 356,320.46/x
  3. Step 3: Cross multiply
    642,824.75x = 887,038.49 × 356,320.46
  4. Step 4: Simplify right side
    642,824.75x = 316,069,965,902.90
  5. Step 5: Solve for x
    x = 316,069,965,902.90/642,824.75
  6. Step 6: Final answer
    x = 491,689.17

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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.