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Finding the Fourth Proportional to 914.38, 1,261.84 and 500.38

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Solution

The fourth proportional to 914.38, 1,261.84 and 500.38 is: 690.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.38 : 1,261.84 = 500.38 : x
  2. Step 2: Convert to fraction form
    914.38/1,261.84 = 500.38/x
  3. Step 3: Cross multiply
    914.38x = 1,261.84 × 500.38
  4. Step 4: Simplify right side
    914.38x = 631,393.19
  5. Step 5: Solve for x
    x = 631,393.19/914.38
  6. Step 6: Final answer
    x = 690.52

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Double scale
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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.