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Finding the Fourth Proportional to 931.23, 1,284.81 and 532.88

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Solution

The fourth proportional to 931.23, 1,284.81 and 532.88 is: 735.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.23 : 1,284.81 = 532.88 : x
  2. Step 2: Convert to fraction form
    931.23/1,284.81 = 532.88/x
  3. Step 3: Cross multiply
    931.23x = 1,284.81 × 532.88
  4. Step 4: Simplify right side
    931.23x = 684,643.13
  5. Step 5: Solve for x
    x = 684,643.13/931.23
  6. Step 6: Final answer
    x = 735.20

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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.