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Finding the Fourth Proportional to 554.05, 763.42 and 458.45

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Solution

The fourth proportional to 554.05, 763.42 and 458.45 is: 631.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.05 : 763.42 = 458.45 : x
  2. Step 2: Convert to fraction form
    554.05/763.42 = 458.45/x
  3. Step 3: Cross multiply
    554.05x = 763.42 × 458.45
  4. Step 4: Simplify right side
    554.05x = 349,987.61
  5. Step 5: Solve for x
    x = 349,987.61/554.05
  6. Step 6: Final answer
    x = 631.69

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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.