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Finding the Fourth Proportional to 280,272.49, 386,674.90 and 215,761.48

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Solution

The fourth proportional to 280,272.49, 386,674.90 and 215,761.48 is: 297,672.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,272.49 : 386,674.90 = 215,761.48 : x
  2. Step 2: Convert to fraction form
    280,272.49/386,674.90 = 215,761.48/x
  3. Step 3: Cross multiply
    280,272.49x = 386,674.90 × 215,761.48
  4. Step 4: Simplify right side
    280,272.49x = 83,429,548,702.85
  5. Step 5: Solve for x
    x = 83,429,548,702.85/280,272.49
  6. Step 6: Final answer
    x = 297,672.98

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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.