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Finding the Fourth Proportional to 507.84, 699.18 and 451.56

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Solution

The fourth proportional to 507.84, 699.18 and 451.56 is: 621.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.84 : 699.18 = 451.56 : x
  2. Step 2: Convert to fraction form
    507.84/699.18 = 451.56/x
  3. Step 3: Cross multiply
    507.84x = 699.18 × 451.56
  4. Step 4: Simplify right side
    507.84x = 315,721.72
  5. Step 5: Solve for x
    x = 315,721.72/507.84
  6. Step 6: Final answer
    x = 621.70

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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.