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Finding the Fourth Proportional to 310,262.96, 428,168.66 and 172,454.79

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Solution

The fourth proportional to 310,262.96, 428,168.66 and 172,454.79 is: 237,990.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,262.96 : 428,168.66 = 172,454.79 : x
  2. Step 2: Convert to fraction form
    310,262.96/428,168.66 = 172,454.79/x
  3. Step 3: Cross multiply
    310,262.96x = 428,168.66 × 172,454.79
  4. Step 4: Simplify right side
    310,262.96x = 73,839,736,344.88
  5. Step 5: Solve for x
    x = 73,839,736,344.88/310,262.96
  6. Step 6: Final answer
    x = 237,990.82

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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.