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Finding the Fourth Proportional to 342,511.20, 472,655.68 and 189,555.78

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Solution

The fourth proportional to 342,511.20, 472,655.68 and 189,555.78 is: 261,581.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,511.20 : 472,655.68 = 189,555.78 : x
  2. Step 2: Convert to fraction form
    342,511.20/472,655.68 = 189,555.78/x
  3. Step 3: Cross multiply
    342,511.20x = 472,655.68 × 189,555.78
  4. Step 4: Simplify right side
    342,511.20x = 89,594,616,093.83
  5. Step 5: Solve for x
    x = 89,594,616,093.83/342,511.20
  6. Step 6: Final answer
    x = 261,581.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.