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Finding the Fourth Proportional to 1,117.84, 1,542.28 and 651.92

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Solution

The fourth proportional to 1,117.84, 1,542.28 and 651.92 is: 899.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.84 : 1,542.28 = 651.92 : x
  2. Step 2: Convert to fraction form
    1,117.84/1,542.28 = 651.92/x
  3. Step 3: Cross multiply
    1,117.84x = 1,542.28 × 651.92
  4. Step 4: Simplify right side
    1,117.84x = 1,005,443.18
  5. Step 5: Solve for x
    x = 1,005,443.18/1,117.84
  6. Step 6: Final answer
    x = 899.45

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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.