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Finding the Fourth Proportional to 527.50, 791.40 and 435.77

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Solution

The fourth proportional to 527.50, 791.40 and 435.77 is: 653.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.50 : 791.40 = 435.77 : x
  2. Step 2: Convert to fraction form
    527.50/791.40 = 435.77/x
  3. Step 3: Cross multiply
    527.50x = 791.40 × 435.77
  4. Step 4: Simplify right side
    527.50x = 344,869.02
  5. Step 5: Solve for x
    x = 344,869.02/527.50
  6. Step 6: Final answer
    x = 653.78

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Double scale
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1.5x scale

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.