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Finding the Fourth Proportional to 552.32, 761.78 and 478.50

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Solution

The fourth proportional to 552.32, 761.78 and 478.50 is: 659.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.32 : 761.78 = 478.50 : x
  2. Step 2: Convert to fraction form
    552.32/761.78 = 478.50/x
  3. Step 3: Cross multiply
    552.32x = 761.78 × 478.50
  4. Step 4: Simplify right side
    552.32x = 364,509.34
  5. Step 5: Solve for x
    x = 364,509.34/552.32
  6. Step 6: Final answer
    x = 659.97

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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.