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Finding the Fourth Proportional to 914.79, 1,262.45 and 521.74

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Solution

The fourth proportional to 914.79, 1,262.45 and 521.74 is: 720.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.79 : 1,262.45 = 521.74 : x
  2. Step 2: Convert to fraction form
    914.79/1,262.45 = 521.74/x
  3. Step 3: Cross multiply
    914.79x = 1,262.45 × 521.74
  4. Step 4: Simplify right side
    914.79x = 658,670.66
  5. Step 5: Solve for x
    x = 658,670.66/914.79
  6. Step 6: Final answer
    x = 720.02

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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.