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Finding the Fourth Proportional to 287,700.25, 396,948.45 and 163,519.50

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Solution

The fourth proportional to 287,700.25, 396,948.45 and 163,519.50 is: 225,612.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,700.25 : 396,948.45 = 163,519.50 : x
  2. Step 2: Convert to fraction form
    287,700.25/396,948.45 = 163,519.50/x
  3. Step 3: Cross multiply
    287,700.25x = 396,948.45 × 163,519.50
  4. Step 4: Simplify right side
    287,700.25x = 64,908,814,171.53
  5. Step 5: Solve for x
    x = 64,908,814,171.53/287,700.25
  6. Step 6: Final answer
    x = 225,612.64

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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.