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Finding the Fourth Proportional to 717.48, 990.25 and 469.01

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Solution

The fourth proportional to 717.48, 990.25 and 469.01 is: 647.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.48 : 990.25 = 469.01 : x
  2. Step 2: Convert to fraction form
    717.48/990.25 = 469.01/x
  3. Step 3: Cross multiply
    717.48x = 990.25 × 469.01
  4. Step 4: Simplify right side
    717.48x = 464,437.15
  5. Step 5: Solve for x
    x = 464,437.15/717.48
  6. Step 6: Final answer
    x = 647.32

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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.