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Finding the Fourth Proportional to 661,122.90, 912,037.86 and 479,436.39

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Solution

The fourth proportional to 661,122.90, 912,037.86 and 479,436.39 is: 661,396.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,122.90 : 912,037.86 = 479,436.39 : x
  2. Step 2: Convert to fraction form
    661,122.90/912,037.86 = 479,436.39/x
  3. Step 3: Cross multiply
    661,122.90x = 912,037.86 × 479,436.39
  4. Step 4: Simplify right side
    661,122.90x = 437,264,139,141.73
  5. Step 5: Solve for x
    x = 437,264,139,141.73/661,122.90
  6. Step 6: Final answer
    x = 661,396.15

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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.