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Finding the Fourth Proportional to 260,793.60, 390,687.36 and 155,696.64

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Solution

The fourth proportional to 260,793.60, 390,687.36 and 155,696.64 is: 233,244.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,793.60 : 390,687.36 = 155,696.64 : x
  2. Step 2: Convert to fraction form
    260,793.60/390,687.36 = 155,696.64/x
  3. Step 3: Cross multiply
    260,793.60x = 390,687.36 × 155,696.64
  4. Step 4: Simplify right side
    260,793.60x = 60,828,709,242.47
  5. Step 5: Solve for x
    x = 60,828,709,242.47/260,793.60
  6. Step 6: Final answer
    x = 233,244.64

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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.