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Finding the Fourth Proportional to 914.90, 1,370.72 and 524.48

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Solution

The fourth proportional to 914.90, 1,370.72 and 524.48 is: 785.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.90 : 1,370.72 = 524.48 : x
  2. Step 2: Convert to fraction form
    914.90/1,370.72 = 524.48/x
  3. Step 3: Cross multiply
    914.90x = 1,370.72 × 524.48
  4. Step 4: Simplify right side
    914.90x = 718,909.68
  5. Step 5: Solve for x
    x = 718,909.68/914.90
  6. Step 6: Final answer
    x = 785.78

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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.