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Finding the Fourth Proportional to 691.16, 954.45 and 481.57

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Solution

The fourth proportional to 691.16, 954.45 and 481.57 is: 665.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.16 : 954.45 = 481.57 : x
  2. Step 2: Convert to fraction form
    691.16/954.45 = 481.57/x
  3. Step 3: Cross multiply
    691.16x = 954.45 × 481.57
  4. Step 4: Simplify right side
    691.16x = 459,632.10
  5. Step 5: Solve for x
    x = 459,632.10/691.16
  6. Step 6: Final answer
    x = 665.02

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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.