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Finding the Fourth Proportional to 390,010.80, 584,843.40 and 179,713.20

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Solution

The fourth proportional to 390,010.80, 584,843.40 and 179,713.20 is: 269,490.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,010.80 : 584,843.40 = 179,713.20 : x
  2. Step 2: Convert to fraction form
    390,010.80/584,843.40 = 179,713.20/x
  3. Step 3: Cross multiply
    390,010.80x = 584,843.40 × 179,713.20
  4. Step 4: Simplify right side
    390,010.80x = 105,104,078,912.88
  5. Step 5: Solve for x
    x = 105,104,078,912.88/390,010.80
  6. Step 6: Final answer
    x = 269,490.18

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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.