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Finding the Fourth Proportional to 934.74, 1,400.51 and 660.30

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Solution

The fourth proportional to 934.74, 1,400.51 and 660.30 is: 989.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.74 : 1,400.51 = 660.30 : x
  2. Step 2: Convert to fraction form
    934.74/1,400.51 = 660.30/x
  3. Step 3: Cross multiply
    934.74x = 1,400.51 × 660.30
  4. Step 4: Simplify right side
    934.74x = 924,756.75
  5. Step 5: Solve for x
    x = 924,756.75/934.74
  6. Step 6: Final answer
    x = 989.32

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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.