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Finding the Fourth Proportional to 1,452.41, 2,178.79 and 528.40

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Solution

The fourth proportional to 1,452.41, 2,178.79 and 528.40 is: 792.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,452.41 : 2,178.79 = 528.40 : x
  2. Step 2: Convert to fraction form
    1,452.41/2,178.79 = 528.40/x
  3. Step 3: Cross multiply
    1,452.41x = 2,178.79 × 528.40
  4. Step 4: Simplify right side
    1,452.41x = 1,151,261.74
  5. Step 5: Solve for x
    x = 1,151,261.74/1,452.41
  6. Step 6: Final answer
    x = 792.66

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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.