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Finding the Fourth Proportional to 390,018.80, 584,855.40 and 179,721.20

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Solution

The fourth proportional to 390,018.80, 584,855.40 and 179,721.20 is: 269,502.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,018.80 : 584,855.40 = 179,721.20 : x
  2. Step 2: Convert to fraction form
    390,018.80/584,855.40 = 179,721.20/x
  3. Step 3: Cross multiply
    390,018.80x = 584,855.40 × 179,721.20
  4. Step 4: Simplify right side
    390,018.80x = 105,110,914,314.48
  5. Step 5: Solve for x
    x = 105,110,914,314.48/390,018.80
  6. Step 6: Final answer
    x = 269,502.17

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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.