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Finding the Fourth Proportional to 668.51, 921.60 and 537.29

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Solution

The fourth proportional to 668.51, 921.60 and 537.29 is: 740.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.51 : 921.60 = 537.29 : x
  2. Step 2: Convert to fraction form
    668.51/921.60 = 537.29/x
  3. Step 3: Cross multiply
    668.51x = 921.60 × 537.29
  4. Step 4: Simplify right side
    668.51x = 495,161.86
  5. Step 5: Solve for x
    x = 495,161.86/668.51
  6. Step 6: Final answer
    x = 740.70

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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.