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Finding the Fourth Proportional to 1,084.84, 1,627.28 and 315.34

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Solution

The fourth proportional to 1,084.84, 1,627.28 and 315.34 is: 473.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.84 : 1,627.28 = 315.34 : x
  2. Step 2: Convert to fraction form
    1,084.84/1,627.28 = 315.34/x
  3. Step 3: Cross multiply
    1,084.84x = 1,627.28 × 315.34
  4. Step 4: Simplify right side
    1,084.84x = 513,146.48
  5. Step 5: Solve for x
    x = 513,146.48/1,084.84
  6. Step 6: Final answer
    x = 473.02

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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.