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Finding the Fourth Proportional to 507.85, 699.99 and 402.76

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Solution

The fourth proportional to 507.85, 699.99 and 402.76 is: 555.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.85 : 699.99 = 402.76 : x
  2. Step 2: Convert to fraction form
    507.85/699.99 = 402.76/x
  3. Step 3: Cross multiply
    507.85x = 699.99 × 402.76
  4. Step 4: Simplify right side
    507.85x = 281,927.97
  5. Step 5: Solve for x
    x = 281,927.97/507.85
  6. Step 6: Final answer
    x = 555.14

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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.