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Finding the Fourth Proportional to 478,061.19, 659,712.60 and 274,232.79

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Solution

The fourth proportional to 478,061.19, 659,712.60 and 274,232.79 is: 378,434.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,061.19 : 659,712.60 = 274,232.79 : x
  2. Step 2: Convert to fraction form
    478,061.19/659,712.60 = 274,232.79/x
  3. Step 3: Cross multiply
    478,061.19x = 659,712.60 × 274,232.79
  4. Step 4: Simplify right side
    478,061.19x = 180,914,826,896.15
  5. Step 5: Solve for x
    x = 180,914,826,896.15/478,061.19
  6. Step 6: Final answer
    x = 378,434.46

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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.