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Finding the Fourth Proportional to 297,058.80, 445,690.20 and 86,727.60

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Solution

The fourth proportional to 297,058.80, 445,690.20 and 86,727.60 is: 130,121.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,058.80 : 445,690.20 = 86,727.60 : x
  2. Step 2: Convert to fraction form
    297,058.80/445,690.20 = 86,727.60/x
  3. Step 3: Cross multiply
    297,058.80x = 445,690.20 × 86,727.60
  4. Step 4: Simplify right side
    297,058.80x = 38,653,641,389.52
  5. Step 5: Solve for x
    x = 38,653,641,389.52/297,058.80
  6. Step 6: Final answer
    x = 130,121.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.