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Finding the Fourth Proportional to 710.20, 1,064.64 and 401.92

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Solution

The fourth proportional to 710.20, 1,064.64 and 401.92 is: 602.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.20 : 1,064.64 = 401.92 : x
  2. Step 2: Convert to fraction form
    710.20/1,064.64 = 401.92/x
  3. Step 3: Cross multiply
    710.20x = 1,064.64 × 401.92
  4. Step 4: Simplify right side
    710.20x = 427,900.11
  5. Step 5: Solve for x
    x = 427,900.11/710.20
  6. Step 6: Final answer
    x = 602.51

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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.