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Finding the Fourth Proportional to 308,218.91, 425,473.07 and 187,398.80

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Solution

The fourth proportional to 308,218.91, 425,473.07 and 187,398.80 is: 258,689.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,218.91 : 425,473.07 = 187,398.80 : x
  2. Step 2: Convert to fraction form
    308,218.91/425,473.07 = 187,398.80/x
  3. Step 3: Cross multiply
    308,218.91x = 425,473.07 × 187,398.80
  4. Step 4: Simplify right side
    308,218.91x = 79,733,142,750.32
  5. Step 5: Solve for x
    x = 79,733,142,750.32/308,218.91
  6. Step 6: Final answer
    x = 258,689.98

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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.