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Finding the Fourth Proportional to 458,130.30, 687,339.45 and 221,480.70

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Solution

The fourth proportional to 458,130.30, 687,339.45 and 221,480.70 is: 332,290.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,130.30 : 687,339.45 = 221,480.70 : x
  2. Step 2: Convert to fraction form
    458,130.30/687,339.45 = 221,480.70/x
  3. Step 3: Cross multiply
    458,130.30x = 687,339.45 × 221,480.70
  4. Step 4: Simplify right side
    458,130.30x = 152,232,422,523.62
  5. Step 5: Solve for x
    x = 152,232,422,523.62/458,130.30
  6. Step 6: Final answer
    x = 332,290.67

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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.