Home / 761,720.40-1,142,872.20-749,764.80

Finding the Fourth Proportional to 761,720.40, 1,142,872.20 and 749,764.80

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Solution

The fourth proportional to 761,720.40, 1,142,872.20 and 749,764.80 is: 1,124,934.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,720.40 : 1,142,872.20 = 749,764.80 : x
  2. Step 2: Convert to fraction form
    761,720.40/1,142,872.20 = 749,764.80/x
  3. Step 3: Cross multiply
    761,720.40x = 1,142,872.20 × 749,764.80
  4. Step 4: Simplify right side
    761,720.40x = 856,885,346,458.56
  5. Step 5: Solve for x
    x = 856,885,346,458.56/761,720.40
  6. Step 6: Final answer
    x = 1,124,934.22

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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.