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Finding the Fourth Proportional to 478,426.20, 660,236.60 and 263,564.80

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Solution

The fourth proportional to 478,426.20, 660,236.60 and 263,564.80 is: 363,724.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,426.20 : 660,236.60 = 263,564.80 : x
  2. Step 2: Convert to fraction form
    478,426.20/660,236.60 = 263,564.80/x
  3. Step 3: Cross multiply
    478,426.20x = 660,236.60 × 263,564.80
  4. Step 4: Simplify right side
    478,426.20x = 174,015,127,431.68
  5. Step 5: Solve for x
    x = 174,015,127,431.68/478,426.20
  6. Step 6: Final answer
    x = 363,724.08

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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.