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Finding the Fourth Proportional to 482,393.60, 665,595.90 and 278,401.31

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Solution

The fourth proportional to 482,393.60, 665,595.90 and 278,401.31 is: 384,131.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,393.60 : 665,595.90 = 278,401.31 : x
  2. Step 2: Convert to fraction form
    482,393.60/665,595.90 = 278,401.31/x
  3. Step 3: Cross multiply
    482,393.60x = 665,595.90 × 278,401.31
  4. Step 4: Simplify right side
    482,393.60x = 185,302,767,162.65
  5. Step 5: Solve for x
    x = 185,302,767,162.65/482,393.60
  6. Step 6: Final answer
    x = 384,131.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.