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Finding the Fourth Proportional to 854.76, 1,179.32 and 500.56

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Solution

The fourth proportional to 854.76, 1,179.32 and 500.56 is: 690.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.76 : 1,179.32 = 500.56 : x
  2. Step 2: Convert to fraction form
    854.76/1,179.32 = 500.56/x
  3. Step 3: Cross multiply
    854.76x = 1,179.32 × 500.56
  4. Step 4: Simplify right side
    854.76x = 590,320.42
  5. Step 5: Solve for x
    x = 590,320.42/854.76
  6. Step 6: Final answer
    x = 690.63

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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.