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Finding the Fourth Proportional to 671.40, 924.66 and 515.88

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Solution

The fourth proportional to 671.40, 924.66 and 515.88 is: 710.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.40 : 924.66 = 515.88 : x
  2. Step 2: Convert to fraction form
    671.40/924.66 = 515.88/x
  3. Step 3: Cross multiply
    671.40x = 924.66 × 515.88
  4. Step 4: Simplify right side
    671.40x = 477,013.60
  5. Step 5: Solve for x
    x = 477,013.60/671.40
  6. Step 6: Final answer
    x = 710.48

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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.