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Finding the Fourth Proportional to 643,185.08, 887,478 and 371,153.71

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Solution

The fourth proportional to 643,185.08, 887,478 and 371,153.71 is: 512,124.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,185.08 : 887,478 = 371,153.71 : x
  2. Step 2: Convert to fraction form
    643,185.08/887,478 = 371,153.71/x
  3. Step 3: Cross multiply
    643,185.08x = 887,478 × 371,153.71
  4. Step 4: Simplify right side
    643,185.08x = 329,390,747,805.99
  5. Step 5: Solve for x
    x = 329,390,747,805.99/643,185.08
  6. Step 6: Final answer
    x = 512,124.36

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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.