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Finding the Fourth Proportional to 487,800.20, 731,481.60 and 221,423.60

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Solution

The fourth proportional to 487,800.20, 731,481.60 and 221,423.60 is: 332,036.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,800.20 : 731,481.60 = 221,423.60 : x
  2. Step 2: Convert to fraction form
    487,800.20/731,481.60 = 221,423.60/x
  3. Step 3: Cross multiply
    487,800.20x = 731,481.60 × 221,423.60
  4. Step 4: Simplify right side
    487,800.20x = 161,967,289,205.76
  5. Step 5: Solve for x
    x = 161,967,289,205.76/487,800.20
  6. Step 6: Final answer
    x = 332,036.13

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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.