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Finding the Fourth Proportional to 554.74, 763.90 and 475.47

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Solution

The fourth proportional to 554.74, 763.90 and 475.47 is: 654.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.74 : 763.90 = 475.47 : x
  2. Step 2: Convert to fraction form
    554.74/763.90 = 475.47/x
  3. Step 3: Cross multiply
    554.74x = 763.90 × 475.47
  4. Step 4: Simplify right side
    554.74x = 363,210.34
  5. Step 5: Solve for x
    x = 363,210.34/554.74
  6. Step 6: Final answer
    x = 654.74

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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.