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Finding the Fourth Proportional to 927.05, 1,279.33 and 507.40

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Solution

The fourth proportional to 927.05, 1,279.33 and 507.40 is: 700.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.05 : 1,279.33 = 507.40 : x
  2. Step 2: Convert to fraction form
    927.05/1,279.33 = 507.40/x
  3. Step 3: Cross multiply
    927.05x = 1,279.33 × 507.40
  4. Step 4: Simplify right side
    927.05x = 649,127.58
  5. Step 5: Solve for x
    x = 649,127.58/927.05
  6. Step 6: Final answer
    x = 700.21

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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.