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Finding the Fourth Proportional to 887.84, 1,332.78 and 477.78

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Solution

The fourth proportional to 887.84, 1,332.78 and 477.78 is: 717.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.84 : 1,332.78 = 477.78 : x
  2. Step 2: Convert to fraction form
    887.84/1,332.78 = 477.78/x
  3. Step 3: Cross multiply
    887.84x = 1,332.78 × 477.78
  4. Step 4: Simplify right side
    887.84x = 636,775.63
  5. Step 5: Solve for x
    x = 636,775.63/887.84
  6. Step 6: Final answer
    x = 717.22

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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.