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Finding the Fourth Proportional to 478,638.52, 660,521.15 and 263,778.58

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Solution

The fourth proportional to 478,638.52, 660,521.15 and 263,778.58 is: 364,014.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,638.52 : 660,521.15 = 263,778.58 : x
  2. Step 2: Convert to fraction form
    478,638.52/660,521.15 = 263,778.58/x
  3. Step 3: Cross multiply
    478,638.52x = 660,521.15 × 263,778.58
  4. Step 4: Simplify right side
    478,638.52x = 174,231,332,986.65
  5. Step 5: Solve for x
    x = 174,231,332,986.65/478,638.52
  6. Step 6: Final answer
    x = 364,014.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.