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Finding the Fourth Proportional to 492,785.70, 739,178.55 and 315,638.70

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Solution

The fourth proportional to 492,785.70, 739,178.55 and 315,638.70 is: 473,458.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,785.70 : 739,178.55 = 315,638.70 : x
  2. Step 2: Convert to fraction form
    492,785.70/739,178.55 = 315,638.70/x
  3. Step 3: Cross multiply
    492,785.70x = 739,178.55 × 315,638.70
  4. Step 4: Simplify right side
    492,785.70x = 233,313,356,589.89
  5. Step 5: Solve for x
    x = 233,313,356,589.89/492,785.70
  6. Step 6: Final answer
    x = 473,458.05

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Similar ratio
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1.5x scale

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.