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Finding the Fourth Proportional to 287,248.84, 396,419.10 and 159,921.64

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Solution

The fourth proportional to 287,248.84, 396,419.10 and 159,921.64 is: 220,700.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,248.84 : 396,419.10 = 159,921.64 : x
  2. Step 2: Convert to fraction form
    287,248.84/396,419.10 = 159,921.64/x
  3. Step 3: Cross multiply
    287,248.84x = 396,419.10 × 159,921.64
  4. Step 4: Simplify right side
    287,248.84x = 63,395,992,599.32
  5. Step 5: Solve for x
    x = 63,395,992,599.32/287,248.84
  6. Step 6: Final answer
    x = 220,700.60

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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.