Home / 643,715.40-888,121.76-371,747.38

Finding the Fourth Proportional to 643,715.40, 888,121.76 and 371,747.38

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Solution

The fourth proportional to 643,715.40, 888,121.76 and 371,747.38 is: 512,892.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,715.40 : 888,121.76 = 371,747.38 : x
  2. Step 2: Convert to fraction form
    643,715.40/888,121.76 = 371,747.38/x
  3. Step 3: Cross multiply
    643,715.40x = 888,121.76 × 371,747.38
  4. Step 4: Simplify right side
    643,715.40x = 330,156,937,400.99
  5. Step 5: Solve for x
    x = 330,156,937,400.99/643,715.40
  6. Step 6: Final answer
    x = 512,892.71

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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.