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Finding the Fourth Proportional to 280,232.73, 386,620.12 and 215,721.69

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Solution

The fourth proportional to 280,232.73, 386,620.12 and 215,721.69 is: 297,618.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,232.73 : 386,620.12 = 215,721.69 : x
  2. Step 2: Convert to fraction form
    280,232.73/386,620.12 = 215,721.69/x
  3. Step 3: Cross multiply
    280,232.73x = 386,620.12 × 215,721.69
  4. Step 4: Simplify right side
    280,232.73x = 83,402,345,674.40
  5. Step 5: Solve for x
    x = 83,402,345,674.40/280,232.73
  6. Step 6: Final answer
    x = 297,618.15

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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.