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Finding the Fourth Proportional to 1,522.95, 2,101.65 and 824.32

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Solution

The fourth proportional to 1,522.95, 2,101.65 and 824.32 is: 1,137.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,522.95 : 2,101.65 = 824.32 : x
  2. Step 2: Convert to fraction form
    1,522.95/2,101.65 = 824.32/x
  3. Step 3: Cross multiply
    1,522.95x = 2,101.65 × 824.32
  4. Step 4: Simplify right side
    1,522.95x = 1,732,432.13
  5. Step 5: Solve for x
    x = 1,732,432.13/1,522.95
  6. Step 6: Final answer
    x = 1,137.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.