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Finding the Fourth Proportional to 260,528.40, 390,695.40 and 102,724.20

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Solution

The fourth proportional to 260,528.40, 390,695.40 and 102,724.20 is: 154,047.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,528.40 : 390,695.40 = 102,724.20 : x
  2. Step 2: Convert to fraction form
    260,528.40/390,695.40 = 102,724.20/x
  3. Step 3: Cross multiply
    260,528.40x = 390,695.40 × 102,724.20
  4. Step 4: Simplify right side
    260,528.40x = 40,133,872,408.68
  5. Step 5: Solve for x
    x = 40,133,872,408.68/260,528.40
  6. Step 6: Final answer
    x = 154,047.97

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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.