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Finding the Fourth Proportional to 258,508,986.80, 387,763,480.20 and 176,879,649.20

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Solution

The fourth proportional to 258,508,986.80, 387,763,480.20 and 176,879,649.20 is: 265,319,473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,508,986.80 : 387,763,480.20 = 176,879,649.20 : x
  2. Step 2: Convert to fraction form
    258,508,986.80/387,763,480.20 = 176,879,649.20/x
  3. Step 3: Cross multiply
    258,508,986.80x = 387,763,480.20 × 176,879,649.20
  4. Step 4: Simplify right side
    258,508,986.80x = 68,587,468,350,347,136
  5. Step 5: Solve for x
    x = 68,587,468,350,347,136/258,508,986.80
  6. Step 6: Final answer
    x = 265,319,473.80

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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.