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Finding the Fourth Proportional to 931.27, 1,397.01 and 282.01

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Solution

The fourth proportional to 931.27, 1,397.01 and 282.01 is: 423.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.27 : 1,397.01 = 282.01 : x
  2. Step 2: Convert to fraction form
    931.27/1,397.01 = 282.01/x
  3. Step 3: Cross multiply
    931.27x = 1,397.01 × 282.01
  4. Step 4: Simplify right side
    931.27x = 393,970.79
  5. Step 5: Solve for x
    x = 393,970.79/931.27
  6. Step 6: Final answer
    x = 423.05

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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.