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Finding the Fourth Proportional to 305.57, 458.35 and 143.13

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Solution

The fourth proportional to 305.57, 458.35 and 143.13 is: 214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.57 : 458.35 = 143.13 : x
  2. Step 2: Convert to fraction form
    305.57/458.35 = 143.13/x
  3. Step 3: Cross multiply
    305.57x = 458.35 × 143.13
  4. Step 4: Simplify right side
    305.57x = 65,603.28
  5. Step 5: Solve for x
    x = 65,603.28/305.57
  6. Step 6: Final answer
    x = 214.70

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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.