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Finding the Fourth Proportional to 440,640.78, 608,085.90 and 239,436.78

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Solution

The fourth proportional to 440,640.78, 608,085.90 and 239,436.78 is: 330,423.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,640.78 : 608,085.90 = 239,436.78 : x
  2. Step 2: Convert to fraction form
    440,640.78/608,085.90 = 239,436.78/x
  3. Step 3: Cross multiply
    440,640.78x = 608,085.90 × 239,436.78
  4. Step 4: Simplify right side
    440,640.78x = 145,598,129,859.40
  5. Step 5: Solve for x
    x = 145,598,129,859.40/440,640.78
  6. Step 6: Final answer
    x = 330,423.64

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1.5x scale

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.