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Finding the Fourth Proportional to 527.70, 722.78 and 497.79

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Solution

The fourth proportional to 527.70, 722.78 and 497.79 is: 681.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.70 : 722.78 = 497.79 : x
  2. Step 2: Convert to fraction form
    527.70/722.78 = 497.79/x
  3. Step 3: Cross multiply
    527.70x = 722.78 × 497.79
  4. Step 4: Simplify right side
    527.70x = 359,790.17
  5. Step 5: Solve for x
    x = 359,790.17/527.70
  6. Step 6: Final answer
    x = 681.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.