Home / 1,487.42-2,231.14-707.49

Finding the Fourth Proportional to 1,487.42, 2,231.14 and 707.49

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Solution

The fourth proportional to 1,487.42, 2,231.14 and 707.49 is: 1,061.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.42 : 2,231.14 = 707.49 : x
  2. Step 2: Convert to fraction form
    1,487.42/2,231.14 = 707.49/x
  3. Step 3: Cross multiply
    1,487.42x = 2,231.14 × 707.49
  4. Step 4: Simplify right side
    1,487.42x = 1,578,514.82
  5. Step 5: Solve for x
    x = 1,578,514.82/1,487.42
  6. Step 6: Final answer
    x = 1,061.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.