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Finding the Fourth Proportional to 287,656.68, 396,966.78 and 160,329.72

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Solution

The fourth proportional to 287,656.68, 396,966.78 and 160,329.72 is: 221,255.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,656.68 : 396,966.78 = 160,329.72 : x
  2. Step 2: Convert to fraction form
    287,656.68/396,966.78 = 160,329.72/x
  3. Step 3: Cross multiply
    287,656.68x = 396,966.78 × 160,329.72
  4. Step 4: Simplify right side
    287,656.68x = 63,645,572,686.70
  5. Step 5: Solve for x
    x = 63,645,572,686.70/287,656.68
  6. Step 6: Final answer
    x = 221,255.33

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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.