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Finding the Fourth Proportional to 841.80, 1,262.39 and 354.89

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Solution

The fourth proportional to 841.80, 1,262.39 and 354.89 is: 532.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.80 : 1,262.39 = 354.89 : x
  2. Step 2: Convert to fraction form
    841.80/1,262.39 = 354.89/x
  3. Step 3: Cross multiply
    841.80x = 1,262.39 × 354.89
  4. Step 4: Simplify right side
    841.80x = 448,003.28
  5. Step 5: Solve for x
    x = 448,003.28/841.80
  6. Step 6: Final answer
    x = 532.20

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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.