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Finding the Fourth Proportional to 258,061.80, 387,092.70 and 163,583.40

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Solution

The fourth proportional to 258,061.80, 387,092.70 and 163,583.40 is: 245,375.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,061.80 : 387,092.70 = 163,583.40 : x
  2. Step 2: Convert to fraction form
    258,061.80/387,092.70 = 163,583.40/x
  3. Step 3: Cross multiply
    258,061.80x = 387,092.70 × 163,583.40
  4. Step 4: Simplify right side
    258,061.80x = 63,321,939,981.18
  5. Step 5: Solve for x
    x = 63,321,939,981.18/258,061.80
  6. Step 6: Final answer
    x = 245,375.10

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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.