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Finding the Fourth Proportional to 432,515.97, 648,774 and 128,914.83

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Solution

The fourth proportional to 432,515.97, 648,774 and 128,914.83 is: 193,372.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,515.97 : 648,774 = 128,914.83 : x
  2. Step 2: Convert to fraction form
    432,515.97/648,774 = 128,914.83/x
  3. Step 3: Cross multiply
    432,515.97x = 648,774 × 128,914.83
  4. Step 4: Simplify right side
    432,515.97x = 83,636,589,918.42
  5. Step 5: Solve for x
    x = 83,636,589,918.42/432,515.97
  6. Step 6: Final answer
    x = 193,372.26

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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.