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Finding the Fourth Proportional to 478,422.60, 660,177.72 and 274,490.32

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Solution

The fourth proportional to 478,422.60, 660,177.72 and 274,490.32 is: 378,770.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,422.60 : 660,177.72 = 274,490.32 : x
  2. Step 2: Convert to fraction form
    478,422.60/660,177.72 = 274,490.32/x
  3. Step 3: Cross multiply
    478,422.60x = 660,177.72 × 274,490.32
  4. Step 4: Simplify right side
    478,422.60x = 181,212,393,619.67
  5. Step 5: Solve for x
    x = 181,212,393,619.67/478,422.60
  6. Step 6: Final answer
    x = 378,770.55

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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.