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Finding the Fourth Proportional to 718.07, 1,076.45 and 498.79

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Solution

The fourth proportional to 718.07, 1,076.45 and 498.79 is: 747.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.07 : 1,076.45 = 498.79 : x
  2. Step 2: Convert to fraction form
    718.07/1,076.45 = 498.79/x
  3. Step 3: Cross multiply
    718.07x = 1,076.45 × 498.79
  4. Step 4: Simplify right side
    718.07x = 536,925.15
  5. Step 5: Solve for x
    x = 536,925.15/718.07
  6. Step 6: Final answer
    x = 747.74

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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.