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Finding the Fourth Proportional to 280,530.49, 387,086.70 and 159,673.63

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Solution

The fourth proportional to 280,530.49, 387,086.70 and 159,673.63 is: 220,323.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,530.49 : 387,086.70 = 159,673.63 : x
  2. Step 2: Convert to fraction form
    280,530.49/387,086.70 = 159,673.63/x
  3. Step 3: Cross multiply
    280,530.49x = 387,086.70 × 159,673.63
  4. Step 4: Simplify right side
    280,530.49x = 61,807,538,513.72
  5. Step 5: Solve for x
    x = 61,807,538,513.72/280,530.49
  6. Step 6: Final answer
    x = 220,323.78

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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.