Home / 420,947.40-630,983.70-231,115.80

Finding the Fourth Proportional to 420,947.40, 630,983.70 and 231,115.80

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Solution

The fourth proportional to 420,947.40, 630,983.70 and 231,115.80 is: 346,433.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,947.40 : 630,983.70 = 231,115.80 : x
  2. Step 2: Convert to fraction form
    420,947.40/630,983.70 = 231,115.80/x
  3. Step 3: Cross multiply
    420,947.40x = 630,983.70 × 231,115.80
  4. Step 4: Simplify right side
    420,947.40x = 145,830,302,612.46
  5. Step 5: Solve for x
    x = 145,830,302,612.46/420,947.40
  6. Step 6: Final answer
    x = 346,433.55

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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.