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Finding the Fourth Proportional to 260,572.20, 390,987.90 and 102,805.80

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Solution

The fourth proportional to 260,572.20, 390,987.90 and 102,805.80 is: 154,259.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,572.20 : 390,987.90 = 102,805.80 : x
  2. Step 2: Convert to fraction form
    260,572.20/390,987.90 = 102,805.80/x
  3. Step 3: Cross multiply
    260,572.20x = 390,987.90 × 102,805.80
  4. Step 4: Simplify right side
    260,572.20x = 40,195,823,849.82
  5. Step 5: Solve for x
    x = 40,195,823,849.82/260,572.20
  6. Step 6: Final answer
    x = 154,259.83

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1.5x scale

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.