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Finding the Fourth Proportional to 393,881.20, 591,113.40 and 260,717.20

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Solution

The fourth proportional to 393,881.20, 591,113.40 and 260,717.20 is: 391,268.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,881.20 : 591,113.40 = 260,717.20 : x
  2. Step 2: Convert to fraction form
    393,881.20/591,113.40 = 260,717.20/x
  3. Step 3: Cross multiply
    393,881.20x = 591,113.40 × 260,717.20
  4. Step 4: Simplify right side
    393,881.20x = 154,113,430,530.48
  5. Step 5: Solve for x
    x = 154,113,430,530.48/393,881.20
  6. Step 6: Final answer
    x = 391,268.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.