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Finding the Fourth Proportional to 988.72, 1,482.47 and 468.40

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Solution

The fourth proportional to 988.72, 1,482.47 and 468.40 is: 702.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.72 : 1,482.47 = 468.40 : x
  2. Step 2: Convert to fraction form
    988.72/1,482.47 = 468.40/x
  3. Step 3: Cross multiply
    988.72x = 1,482.47 × 468.40
  4. Step 4: Simplify right side
    988.72x = 694,388.95
  5. Step 5: Solve for x
    x = 694,388.95/988.72
  6. Step 6: Final answer
    x = 702.31

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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.