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Finding the Fourth Proportional to 663,099.42, 915,064.80 and 368,767.18

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Solution

The fourth proportional to 663,099.42, 915,064.80 and 368,767.18 is: 508,891.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,099.42 : 915,064.80 = 368,767.18 : x
  2. Step 2: Convert to fraction form
    663,099.42/915,064.80 = 368,767.18/x
  3. Step 3: Cross multiply
    663,099.42x = 915,064.80 × 368,767.18
  4. Step 4: Simplify right side
    663,099.42x = 337,445,865,813.26
  5. Step 5: Solve for x
    x = 337,445,865,813.26/663,099.42
  6. Step 6: Final answer
    x = 508,891.81

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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.