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Finding the Fourth Proportional to 527.85, 728.59 and 306.76

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Solution

The fourth proportional to 527.85, 728.59 and 306.76 is: 423.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.85 : 728.59 = 306.76 : x
  2. Step 2: Convert to fraction form
    527.85/728.59 = 306.76/x
  3. Step 3: Cross multiply
    527.85x = 728.59 × 306.76
  4. Step 4: Simplify right side
    527.85x = 223,502.27
  5. Step 5: Solve for x
    x = 223,502.27/527.85
  6. Step 6: Final answer
    x = 423.42

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Find fourth proportional to 263.93, 364.30 and 153.38
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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.