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Finding the Fourth Proportional to 345,511.39, 518,340.88 and 120,879.16

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Solution

The fourth proportional to 345,511.39, 518,340.88 and 120,879.16 is: 181,344.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,511.39 : 518,340.88 = 120,879.16 : x
  2. Step 2: Convert to fraction form
    345,511.39/518,340.88 = 120,879.16/x
  3. Step 3: Cross multiply
    345,511.39x = 518,340.88 × 120,879.16
  4. Step 4: Simplify right side
    345,511.39x = 62,656,607,576.36
  5. Step 5: Solve for x
    x = 62,656,607,576.36/345,511.39
  6. Step 6: Final answer
    x = 181,344.55

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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.