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Finding the Fourth Proportional to 260,411.48, 390,616.08 and 110,628.80

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Solution

The fourth proportional to 260,411.48, 390,616.08 and 110,628.80 is: 165,942.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,411.48 : 390,616.08 = 110,628.80 : x
  2. Step 2: Convert to fraction form
    260,411.48/390,616.08 = 110,628.80/x
  3. Step 3: Cross multiply
    260,411.48x = 390,616.08 × 110,628.80
  4. Step 4: Simplify right side
    260,411.48x = 43,213,388,191.10
  5. Step 5: Solve for x
    x = 43,213,388,191.10/260,411.48
  6. Step 6: Final answer
    x = 165,942.72

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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.