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Finding the Fourth Proportional to 798.60, 1,101.66 and 499.98

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Solution

The fourth proportional to 798.60, 1,101.66 and 499.98 is: 689.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.60 : 1,101.66 = 499.98 : x
  2. Step 2: Convert to fraction form
    798.60/1,101.66 = 499.98/x
  3. Step 3: Cross multiply
    798.60x = 1,101.66 × 499.98
  4. Step 4: Simplify right side
    798.60x = 550,807.97
  5. Step 5: Solve for x
    x = 550,807.97/798.60
  6. Step 6: Final answer
    x = 689.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.