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Finding the Fourth Proportional to 331,360.80, 497,041.20 and 280,039.20

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Solution

The fourth proportional to 331,360.80, 497,041.20 and 280,039.20 is: 420,058.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,360.80 : 497,041.20 = 280,039.20 : x
  2. Step 2: Convert to fraction form
    331,360.80/497,041.20 = 280,039.20/x
  3. Step 3: Cross multiply
    331,360.80x = 497,041.20 × 280,039.20
  4. Step 4: Simplify right side
    331,360.80x = 139,191,020,015.04
  5. Step 5: Solve for x
    x = 139,191,020,015.04/331,360.80
  6. Step 6: Final answer
    x = 420,058.80

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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.