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Finding the Fourth Proportional to 988.88, 1,482.30 and 372.20

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Solution

The fourth proportional to 988.88, 1,482.30 and 372.20 is: 557.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.88 : 1,482.30 = 372.20 : x
  2. Step 2: Convert to fraction form
    988.88/1,482.30 = 372.20/x
  3. Step 3: Cross multiply
    988.88x = 1,482.30 × 372.20
  4. Step 4: Simplify right side
    988.88x = 551,712.06
  5. Step 5: Solve for x
    x = 551,712.06/988.88
  6. Step 6: Final answer
    x = 557.92

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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.