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Finding the Fourth Proportional to 312,587.32, 431,369.70 and 169,350.88

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Solution

The fourth proportional to 312,587.32, 431,369.70 and 169,350.88 is: 233,703.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,587.32 : 431,369.70 = 169,350.88 : x
  2. Step 2: Convert to fraction form
    312,587.32/431,369.70 = 169,350.88/x
  3. Step 3: Cross multiply
    312,587.32x = 431,369.70 × 169,350.88
  4. Step 4: Simplify right side
    312,587.32x = 73,052,838,300.34
  5. Step 5: Solve for x
    x = 73,052,838,300.34/312,587.32
  6. Step 6: Final answer
    x = 233,703.78

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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.