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Finding the Fourth Proportional to 305,909.60, 458,864.40 and 221,491.40

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Solution

The fourth proportional to 305,909.60, 458,864.40 and 221,491.40 is: 332,237.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,909.60 : 458,864.40 = 221,491.40 : x
  2. Step 2: Convert to fraction form
    305,909.60/458,864.40 = 221,491.40/x
  3. Step 3: Cross multiply
    305,909.60x = 458,864.40 × 221,491.40
  4. Step 4: Simplify right side
    305,909.60x = 101,634,518,366.16
  5. Step 5: Solve for x
    x = 101,634,518,366.16/305,909.60
  6. Step 6: Final answer
    x = 332,237.10

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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.