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Finding the Fourth Proportional to 287,921.26, 397,328.71 and 158,860.92

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Solution

The fourth proportional to 287,921.26, 397,328.71 and 158,860.92 is: 219,226.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,921.26 : 397,328.71 = 158,860.92 : x
  2. Step 2: Convert to fraction form
    287,921.26/397,328.71 = 158,860.92/x
  3. Step 3: Cross multiply
    287,921.26x = 397,328.71 × 158,860.92
  4. Step 4: Simplify right side
    287,921.26x = 63,120,003,618.71
  5. Step 5: Solve for x
    x = 63,120,003,618.71/287,921.26
  6. Step 6: Final answer
    x = 219,226.62

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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.