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Finding the Fourth Proportional to 432,516.97, 648,775.50 and 128,915.83

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Solution

The fourth proportional to 432,516.97, 648,775.50 and 128,915.83 is: 193,373.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,516.97 : 648,775.50 = 128,915.83 : x
  2. Step 2: Convert to fraction form
    432,516.97/648,775.50 = 128,915.83/x
  3. Step 3: Cross multiply
    432,516.97x = 648,775.50 × 128,915.83
  4. Step 4: Simplify right side
    432,516.97x = 83,637,432,066.17
  5. Step 5: Solve for x
    x = 83,637,432,066.17/432,516.97
  6. Step 6: Final answer
    x = 193,373.76

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1.5x scale

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.