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Finding the Fourth Proportional to 315,528.62, 435,427.80 and 172,288.76

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Solution

The fourth proportional to 315,528.62, 435,427.80 and 172,288.76 is: 237,757.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,528.62 : 435,427.80 = 172,288.76 : x
  2. Step 2: Convert to fraction form
    315,528.62/435,427.80 = 172,288.76/x
  3. Step 3: Cross multiply
    315,528.62x = 435,427.80 × 172,288.76
  4. Step 4: Simplify right side
    315,528.62x = 75,019,315,731.53
  5. Step 5: Solve for x
    x = 75,019,315,731.53/315,528.62
  6. Step 6: Final answer
    x = 237,757.56

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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.