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Finding the Fourth Proportional to 751.38, 1,035.65 and 502.61

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Solution

The fourth proportional to 751.38, 1,035.65 and 502.61 is: 692.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.38 : 1,035.65 = 502.61 : x
  2. Step 2: Convert to fraction form
    751.38/1,035.65 = 502.61/x
  3. Step 3: Cross multiply
    751.38x = 1,035.65 × 502.61
  4. Step 4: Simplify right side
    751.38x = 520,524.12
  5. Step 5: Solve for x
    x = 520,524.12/751.38
  6. Step 6: Final answer
    x = 692.76

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1.5x scale

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.