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Finding the Fourth Proportional to 260,043.40, 390,065.10 and 171,469.90

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Solution

The fourth proportional to 260,043.40, 390,065.10 and 171,469.90 is: 257,204.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,043.40 : 390,065.10 = 171,469.90 : x
  2. Step 2: Convert to fraction form
    260,043.40/390,065.10 = 171,469.90/x
  3. Step 3: Cross multiply
    260,043.40x = 390,065.10 × 171,469.90
  4. Step 4: Simplify right side
    260,043.40x = 66,884,423,690.49
  5. Step 5: Solve for x
    x = 66,884,423,690.49/260,043.40
  6. Step 6: Final answer
    x = 257,204.85

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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.