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Finding the Fourth Proportional to 696,636.28, 961,368.60 and 390,780.46

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Solution

The fourth proportional to 696,636.28, 961,368.60 and 390,780.46 is: 539,282.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,636.28 : 961,368.60 = 390,780.46 : x
  2. Step 2: Convert to fraction form
    696,636.28/961,368.60 = 390,780.46/x
  3. Step 3: Cross multiply
    696,636.28x = 961,368.60 × 390,780.46
  4. Step 4: Simplify right side
    696,636.28x = 375,684,063,737.56
  5. Step 5: Solve for x
    x = 375,684,063,737.56/696,636.28
  6. Step 6: Final answer
    x = 539,282.94

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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.