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Finding the Fourth Proportional to 287,647.61, 396,971.48 and 158,585.45

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Solution

The fourth proportional to 287,647.61, 396,971.48 and 158,585.45 is: 218,857.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,647.61 : 396,971.48 = 158,585.45 : x
  2. Step 2: Convert to fraction form
    287,647.61/396,971.48 = 158,585.45/x
  3. Step 3: Cross multiply
    287,647.61x = 396,971.48 × 158,585.45
  4. Step 4: Simplify right side
    287,647.61x = 62,953,899,204.57
  5. Step 5: Solve for x
    x = 62,953,899,204.57/287,647.61
  6. Step 6: Final answer
    x = 218,857.72

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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.