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Finding the Fourth Proportional to 260,452.80, 390,640.32 and 73,440

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Solution

The fourth proportional to 260,452.80, 390,640.32 and 73,440 is: 110,149.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,452.80 : 390,640.32 = 73,440 : x
  2. Step 2: Convert to fraction form
    260,452.80/390,640.32 = 73,440/x
  3. Step 3: Cross multiply
    260,452.80x = 390,640.32 × 73,440
  4. Step 4: Simplify right side
    260,452.80x = 28,688,625,100.80
  5. Step 5: Solve for x
    x = 28,688,625,100.80/260,452.80
  6. Step 6: Final answer
    x = 110,149.04

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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.