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Finding the Fourth Proportional to 631.72, 947.58 and 618.28

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Solution

The fourth proportional to 631.72, 947.58 and 618.28 is: 927.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.72 : 947.58 = 618.28 : x
  2. Step 2: Convert to fraction form
    631.72/947.58 = 618.28/x
  3. Step 3: Cross multiply
    631.72x = 947.58 × 618.28
  4. Step 4: Simplify right side
    631.72x = 585,869.76
  5. Step 5: Solve for x
    x = 585,869.76/631.72
  6. Step 6: Final answer
    x = 927.42

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Double scale
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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.