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Finding the Fourth Proportional to 783.52, 1,081.20 and 468.84

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Solution

The fourth proportional to 783.52, 1,081.20 and 468.84 is: 646.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.52 : 1,081.20 = 468.84 : x
  2. Step 2: Convert to fraction form
    783.52/1,081.20 = 468.84/x
  3. Step 3: Cross multiply
    783.52x = 1,081.20 × 468.84
  4. Step 4: Simplify right side
    783.52x = 506,906.90
  5. Step 5: Solve for x
    x = 506,906.90/783.52
  6. Step 6: Final answer
    x = 646.96

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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.