Home / 1,291.99-1,939.10-707.52

Finding the Fourth Proportional to 1,291.99, 1,939.10 and 707.52

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Solution

The fourth proportional to 1,291.99, 1,939.10 and 707.52 is: 1,061.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.99 : 1,939.10 = 707.52 : x
  2. Step 2: Convert to fraction form
    1,291.99/1,939.10 = 707.52/x
  3. Step 3: Cross multiply
    1,291.99x = 1,939.10 × 707.52
  4. Step 4: Simplify right side
    1,291.99x = 1,371,946.30
  5. Step 5: Solve for x
    x = 1,371,946.30/1,291.99
  6. Step 6: Final answer
    x = 1,061.89

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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.