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Finding the Fourth Proportional to 641,689.34, 963,480.21 and 357,934.28

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Solution

The fourth proportional to 641,689.34, 963,480.21 and 357,934.28 is: 537,429.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,689.34 : 963,480.21 = 357,934.28 : x
  2. Step 2: Convert to fraction form
    641,689.34/963,480.21 = 357,934.28/x
  3. Step 3: Cross multiply
    641,689.34x = 963,480.21 × 357,934.28
  4. Step 4: Simplify right side
    641,689.34x = 344,862,595,260.60
  5. Step 5: Solve for x
    x = 344,862,595,260.60/641,689.34
  6. Step 6: Final answer
    x = 537,429.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.