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Finding the Fourth Proportional to 507.63, 703.72 and 479.91

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Solution

The fourth proportional to 507.63, 703.72 and 479.91 is: 665.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.63 : 703.72 = 479.91 : x
  2. Step 2: Convert to fraction form
    507.63/703.72 = 479.91/x
  3. Step 3: Cross multiply
    507.63x = 703.72 × 479.91
  4. Step 4: Simplify right side
    507.63x = 337,719.87
  5. Step 5: Solve for x
    x = 337,719.87/507.63
  6. Step 6: Final answer
    x = 665.29

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.