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Finding the Fourth Proportional to 478,840.75, 660,805.32 and 263,988.52

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Solution

The fourth proportional to 478,840.75, 660,805.32 and 263,988.52 is: 364,306.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,840.75 : 660,805.32 = 263,988.52 : x
  2. Step 2: Convert to fraction form
    478,840.75/660,805.32 = 263,988.52/x
  3. Step 3: Cross multiply
    478,840.75x = 660,805.32 × 263,988.52
  4. Step 4: Simplify right side
    478,840.75x = 174,445,017,772.87
  5. Step 5: Solve for x
    x = 174,445,017,772.87/478,840.75
  6. Step 6: Final answer
    x = 364,306.96

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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.