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Finding the Fourth Proportional to 258,488.70, 387,574.29 and 100,533.03

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Solution

The fourth proportional to 258,488.70, 387,574.29 and 100,533.03 is: 150,737.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,488.70 : 387,574.29 = 100,533.03 : x
  2. Step 2: Convert to fraction form
    258,488.70/387,574.29 = 100,533.03/x
  3. Step 3: Cross multiply
    258,488.70x = 387,574.29 × 100,533.03
  4. Step 4: Simplify right side
    258,488.70x = 38,964,017,723.80
  5. Step 5: Solve for x
    x = 38,964,017,723.80/258,488.70
  6. Step 6: Final answer
    x = 150,737.80

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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.