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Finding the Fourth Proportional to 305,903.80, 458,855.70 and 81,298.90

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Solution

The fourth proportional to 305,903.80, 458,855.70 and 81,298.90 is: 121,948.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,903.80 : 458,855.70 = 81,298.90 : x
  2. Step 2: Convert to fraction form
    305,903.80/458,855.70 = 81,298.90/x
  3. Step 3: Cross multiply
    305,903.80x = 458,855.70 × 81,298.90
  4. Step 4: Simplify right side
    305,903.80x = 37,304,463,668.73
  5. Step 5: Solve for x
    x = 37,304,463,668.73/305,903.80
  6. Step 6: Final answer
    x = 121,948.35

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1.5x scale

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.