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Finding the Fourth Proportional to 315,520.52, 435,416.59 and 172,279.53

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Solution

The fourth proportional to 315,520.52, 435,416.59 and 172,279.53 is: 237,744.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,520.52 : 435,416.59 = 172,279.53 : x
  2. Step 2: Convert to fraction form
    315,520.52/435,416.59 = 172,279.53/x
  3. Step 3: Cross multiply
    315,520.52x = 435,416.59 × 172,279.53
  4. Step 4: Simplify right side
    315,520.52x = 75,013,366,434.83
  5. Step 5: Solve for x
    x = 75,013,366,434.83/315,520.52
  6. Step 6: Final answer
    x = 237,744.81

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1.5x scale

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.