Home / 750.20-1,124.54-519.15

Finding the Fourth Proportional to 750.20, 1,124.54 and 519.15

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Solution

The fourth proportional to 750.20, 1,124.54 and 519.15 is: 778.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.20 : 1,124.54 = 519.15 : x
  2. Step 2: Convert to fraction form
    750.20/1,124.54 = 519.15/x
  3. Step 3: Cross multiply
    750.20x = 1,124.54 × 519.15
  4. Step 4: Simplify right side
    750.20x = 583,802.35
  5. Step 5: Solve for x
    x = 583,802.35/750.20
  6. Step 6: Final answer
    x = 778.20

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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.