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Finding the Fourth Proportional to 988.35, 1,482.21 and 294.87

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Solution

The fourth proportional to 988.35, 1,482.21 and 294.87 is: 442.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.35 : 1,482.21 = 294.87 : x
  2. Step 2: Convert to fraction form
    988.35/1,482.21 = 294.87/x
  3. Step 3: Cross multiply
    988.35x = 1,482.21 × 294.87
  4. Step 4: Simplify right side
    988.35x = 437,059.26
  5. Step 5: Solve for x
    x = 437,059.26/988.35
  6. Step 6: Final answer
    x = 442.21

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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.