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Finding the Fourth Proportional to 308,479.70, 425,723.68 and 172,526.30

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Solution

The fourth proportional to 308,479.70, 425,723.68 and 172,526.30 is: 238,098.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,479.70 : 425,723.68 = 172,526.30 : x
  2. Step 2: Convert to fraction form
    308,479.70/425,723.68 = 172,526.30/x
  3. Step 3: Cross multiply
    308,479.70x = 425,723.68 × 172,526.30
  4. Step 4: Simplify right side
    308,479.70x = 73,448,532,182.11
  5. Step 5: Solve for x
    x = 73,448,532,182.11/308,479.70
  6. Step 6: Final answer
    x = 238,098.43

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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.