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Finding the Fourth Proportional to 1,488.64, 2,232.31 and 655.68

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Solution

The fourth proportional to 1,488.64, 2,232.31 and 655.68 is: 983.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.64 : 2,232.31 = 655.68 : x
  2. Step 2: Convert to fraction form
    1,488.64/2,232.31 = 655.68/x
  3. Step 3: Cross multiply
    1,488.64x = 2,232.31 × 655.68
  4. Step 4: Simplify right side
    1,488.64x = 1,463,681.02
  5. Step 5: Solve for x
    x = 1,463,681.02/1,488.64
  6. Step 6: Final answer
    x = 983.23

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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.