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Finding the Fourth Proportional to 631.38, 946.69 and 260.90

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Solution

The fourth proportional to 631.38, 946.69 and 260.90 is: 391.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.38 : 946.69 = 260.90 : x
  2. Step 2: Convert to fraction form
    631.38/946.69 = 260.90/x
  3. Step 3: Cross multiply
    631.38x = 946.69 × 260.90
  4. Step 4: Simplify right side
    631.38x = 246,986.92
  5. Step 5: Solve for x
    x = 246,986.92/631.38
  6. Step 6: Final answer
    x = 391.18

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1.5x scale

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.