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Finding the Fourth Proportional to 432,251.52, 648,319.85 and 128,640.23

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Solution

The fourth proportional to 432,251.52, 648,319.85 and 128,640.23 is: 192,943.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,251.52 : 648,319.85 = 128,640.23 : x
  2. Step 2: Convert to fraction form
    432,251.52/648,319.85 = 128,640.23/x
  3. Step 3: Cross multiply
    432,251.52x = 648,319.85 × 128,640.23
  4. Step 4: Simplify right side
    432,251.52x = 83,400,010,732.77
  5. Step 5: Solve for x
    x = 83,400,010,732.77/432,251.52
  6. Step 6: Final answer
    x = 192,943.24

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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.