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Finding the Fourth Proportional to 280,274.49, 386,677.66 and 215,763.48

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Solution

The fourth proportional to 280,274.49, 386,677.66 and 215,763.48 is: 297,675.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,274.49 : 386,677.66 = 215,763.48 : x
  2. Step 2: Convert to fraction form
    280,274.49/386,677.66 = 215,763.48/x
  3. Step 3: Cross multiply
    280,274.49x = 386,677.66 × 215,763.48
  4. Step 4: Simplify right side
    280,274.49x = 83,430,917,559.86
  5. Step 5: Solve for x
    x = 83,430,917,559.86/280,274.49
  6. Step 6: Final answer
    x = 297,675.74

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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.