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Finding the Fourth Proportional to 478,540.82, 660,347.97 and 277,349.78

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Solution

The fourth proportional to 478,540.82, 660,347.97 and 277,349.78 is: 382,720.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,540.82 : 660,347.97 = 277,349.78 : x
  2. Step 2: Convert to fraction form
    478,540.82/660,347.97 = 277,349.78/x
  3. Step 3: Cross multiply
    478,540.82x = 660,347.97 × 277,349.78
  4. Step 4: Simplify right side
    478,540.82x = 183,147,364,202.95
  5. Step 5: Solve for x
    x = 183,147,364,202.95/478,540.82
  6. Step 6: Final answer
    x = 382,720.46

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1.5x scale

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.