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Finding the Fourth Proportional to 720.41, 993.79 and 458.15

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Solution

The fourth proportional to 720.41, 993.79 and 458.15 is: 632.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.41 : 993.79 = 458.15 : x
  2. Step 2: Convert to fraction form
    720.41/993.79 = 458.15/x
  3. Step 3: Cross multiply
    720.41x = 993.79 × 458.15
  4. Step 4: Simplify right side
    720.41x = 455,304.89
  5. Step 5: Solve for x
    x = 455,304.89/720.41
  6. Step 6: Final answer
    x = 632.01

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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.