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Finding the Fourth Proportional to 458.51, 688.48 and 398.03

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Solution

The fourth proportional to 458.51, 688.48 and 398.03 is: 597.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.51 : 688.48 = 398.03 : x
  2. Step 2: Convert to fraction form
    458.51/688.48 = 398.03/x
  3. Step 3: Cross multiply
    458.51x = 688.48 × 398.03
  4. Step 4: Simplify right side
    458.51x = 274,031.26
  5. Step 5: Solve for x
    x = 274,031.26/458.51
  6. Step 6: Final answer
    x = 597.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.