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Finding the Fourth Proportional to 315,695.84, 435,654.79 and 172,452.20

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Solution

The fourth proportional to 315,695.84, 435,654.79 and 172,452.20 is: 237,981.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,695.84 : 435,654.79 = 172,452.20 : x
  2. Step 2: Convert to fraction form
    315,695.84/435,654.79 = 172,452.20/x
  3. Step 3: Cross multiply
    315,695.84x = 435,654.79 × 172,452.20
  4. Step 4: Simplify right side
    315,695.84x = 75,129,624,366.63
  5. Step 5: Solve for x
    x = 75,129,624,366.63/315,695.84
  6. Step 6: Final answer
    x = 237,981.04

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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.