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Finding the Fourth Proportional to 982.55, 1,473.93 and 434.18

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Solution

The fourth proportional to 982.55, 1,473.93 and 434.18 is: 651.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.55 : 1,473.93 = 434.18 : x
  2. Step 2: Convert to fraction form
    982.55/1,473.93 = 434.18/x
  3. Step 3: Cross multiply
    982.55x = 1,473.93 × 434.18
  4. Step 4: Simplify right side
    982.55x = 639,954.61
  5. Step 5: Solve for x
    x = 639,954.61/982.55
  6. Step 6: Final answer
    x = 651.32

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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.