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Finding the Fourth Proportional to 305,339.41, 458,013.01 and 80,697.90

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Solution

The fourth proportional to 305,339.41, 458,013.01 and 80,697.90 is: 121,047.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,339.41 : 458,013.01 = 80,697.90 : x
  2. Step 2: Convert to fraction form
    305,339.41/458,013.01 = 80,697.90/x
  3. Step 3: Cross multiply
    305,339.41x = 458,013.01 × 80,697.90
  4. Step 4: Simplify right side
    305,339.41x = 36,960,688,888.02
  5. Step 5: Solve for x
    x = 36,960,688,888.02/305,339.41
  6. Step 6: Final answer
    x = 121,047.88

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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.