Home / 1,385,456.80-2,078,379.60-438,728.80

Finding the Fourth Proportional to 1,385,456.80, 2,078,379.60 and 438,728.80

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Solution

The fourth proportional to 1,385,456.80, 2,078,379.60 and 438,728.80 is: 658,154.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,456.80 : 2,078,379.60 = 438,728.80 : x
  2. Step 2: Convert to fraction form
    1,385,456.80/2,078,379.60 = 438,728.80/x
  3. Step 3: Cross multiply
    1,385,456.80x = 2,078,379.60 × 438,728.80
  4. Step 4: Simplify right side
    1,385,456.80x = 911,844,987,852.48
  5. Step 5: Solve for x
    x = 911,844,987,852.48/1,385,456.80
  6. Step 6: Final answer
    x = 658,154.76

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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.