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Finding the Fourth Proportional to 671.16, 924.24 and 669

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Solution

The fourth proportional to 671.16, 924.24 and 669 is: 921.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.16 : 924.24 = 669 : x
  2. Step 2: Convert to fraction form
    671.16/924.24 = 669/x
  3. Step 3: Cross multiply
    671.16x = 924.24 × 669
  4. Step 4: Simplify right side
    671.16x = 618,316.56
  5. Step 5: Solve for x
    x = 618,316.56/671.16
  6. Step 6: Final answer
    x = 921.27

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1.5x scale

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.