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Finding the Fourth Proportional to 347,638.48, 480,020.12 and 279,436.89

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Solution

The fourth proportional to 347,638.48, 480,020.12 and 279,436.89 is: 385,847.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,638.48 : 480,020.12 = 279,436.89 : x
  2. Step 2: Convert to fraction form
    347,638.48/480,020.12 = 279,436.89/x
  3. Step 3: Cross multiply
    347,638.48x = 480,020.12 × 279,436.89
  4. Step 4: Simplify right side
    347,638.48x = 134,135,329,470.23
  5. Step 5: Solve for x
    x = 134,135,329,470.23/347,638.48
  6. Step 6: Final answer
    x = 385,847.19

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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.