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Finding the Fourth Proportional to 1,014.79, 1,522.47 and 398.68

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Solution

The fourth proportional to 1,014.79, 1,522.47 and 398.68 is: 598.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.79 : 1,522.47 = 398.68 : x
  2. Step 2: Convert to fraction form
    1,014.79/1,522.47 = 398.68/x
  3. Step 3: Cross multiply
    1,014.79x = 1,522.47 × 398.68
  4. Step 4: Simplify right side
    1,014.79x = 606,978.34
  5. Step 5: Solve for x
    x = 606,978.34/1,014.79
  6. Step 6: Final answer
    x = 598.13

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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.