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Finding the Fourth Proportional to 934.49, 1,400.14 and 660.05

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Solution

The fourth proportional to 934.49, 1,400.14 and 660.05 is: 988.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.49 : 1,400.14 = 660.05 : x
  2. Step 2: Convert to fraction form
    934.49/1,400.14 = 660.05/x
  3. Step 3: Cross multiply
    934.49x = 1,400.14 × 660.05
  4. Step 4: Simplify right side
    934.49x = 924,157.77
  5. Step 5: Solve for x
    x = 924,157.77/934.49
  6. Step 6: Final answer
    x = 988.95

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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.