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Finding the Fourth Proportional to 691.04, 954.08 and 494.40

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Solution

The fourth proportional to 691.04, 954.08 and 494.40 is: 682.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.04 : 954.08 = 494.40 : x
  2. Step 2: Convert to fraction form
    691.04/954.08 = 494.40/x
  3. Step 3: Cross multiply
    691.04x = 954.08 × 494.40
  4. Step 4: Simplify right side
    691.04x = 471,697.15
  5. Step 5: Solve for x
    x = 471,697.15/691.04
  6. Step 6: Final answer
    x = 682.59

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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.