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Finding the Fourth Proportional to 372,015.30, 557,408.55 and 316,719.30

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Solution

The fourth proportional to 372,015.30, 557,408.55 and 316,719.30 is: 474,555.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,015.30 : 557,408.55 = 316,719.30 : x
  2. Step 2: Convert to fraction form
    372,015.30/557,408.55 = 316,719.30/x
  3. Step 3: Cross multiply
    372,015.30x = 557,408.55 × 316,719.30
  4. Step 4: Simplify right side
    372,015.30x = 176,542,045,770.02
  5. Step 5: Solve for x
    x = 176,542,045,770.02/372,015.30
  6. Step 6: Final answer
    x = 474,555.87

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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.