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Finding the Fourth Proportional to 688.88, 1,030.72 and 496.08

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Solution

The fourth proportional to 688.88, 1,030.72 and 496.08 is: 742.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.88 : 1,030.72 = 496.08 : x
  2. Step 2: Convert to fraction form
    688.88/1,030.72 = 496.08/x
  3. Step 3: Cross multiply
    688.88x = 1,030.72 × 496.08
  4. Step 4: Simplify right side
    688.88x = 511,319.58
  5. Step 5: Solve for x
    x = 511,319.58/688.88
  6. Step 6: Final answer
    x = 742.25

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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.