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Finding the Fourth Proportional to 669.90, 924.48 and 375.15

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Solution

The fourth proportional to 669.90, 924.48 and 375.15 is: 517.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.90 : 924.48 = 375.15 : x
  2. Step 2: Convert to fraction form
    669.90/924.48 = 375.15/x
  3. Step 3: Cross multiply
    669.90x = 924.48 × 375.15
  4. Step 4: Simplify right side
    669.90x = 346,818.67
  5. Step 5: Solve for x
    x = 346,818.67/669.90
  6. Step 6: Final answer
    x = 517.72

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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.