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Finding the Fourth Proportional to 718.83, 1,076.45 and 501.39

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Solution

The fourth proportional to 718.83, 1,076.45 and 501.39 is: 750.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.83 : 1,076.45 = 501.39 : x
  2. Step 2: Convert to fraction form
    718.83/1,076.45 = 501.39/x
  3. Step 3: Cross multiply
    718.83x = 1,076.45 × 501.39
  4. Step 4: Simplify right side
    718.83x = 539,718.76
  5. Step 5: Solve for x
    x = 539,718.76/718.83
  6. Step 6: Final answer
    x = 750.83

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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.