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Finding the Fourth Proportional to 287,642.83, 396,960.69 and 160,319.35

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Solution

The fourth proportional to 287,642.83, 396,960.69 and 160,319.35 is: 221,248.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,642.83 : 396,960.69 = 160,319.35 : x
  2. Step 2: Convert to fraction form
    287,642.83/396,960.69 = 160,319.35/x
  3. Step 3: Cross multiply
    287,642.83x = 396,960.69 × 160,319.35
  4. Step 4: Simplify right side
    287,642.83x = 63,640,479,796.35
  5. Step 5: Solve for x
    x = 63,640,479,796.35/287,642.83
  6. Step 6: Final answer
    x = 221,248.27

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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.