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Finding the Fourth Proportional to 988.31, 1,482.60 and 363.63

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Solution

The fourth proportional to 988.31, 1,482.60 and 363.63 is: 545.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.31 : 1,482.60 = 363.63 : x
  2. Step 2: Convert to fraction form
    988.31/1,482.60 = 363.63/x
  3. Step 3: Cross multiply
    988.31x = 1,482.60 × 363.63
  4. Step 4: Simplify right side
    988.31x = 539,117.84
  5. Step 5: Solve for x
    x = 539,117.84/988.31
  6. Step 6: Final answer
    x = 545.49

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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.