Home / 487,816.40-731,943.30-221,439.80

Finding the Fourth Proportional to 487,816.40, 731,943.30 and 221,439.80

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Solution

The fourth proportional to 487,816.40, 731,943.30 and 221,439.80 is: 332,258.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,816.40 : 731,943.30 = 221,439.80 : x
  2. Step 2: Convert to fraction form
    487,816.40/731,943.30 = 221,439.80/x
  3. Step 3: Cross multiply
    487,816.40x = 731,943.30 × 221,439.80
  4. Step 4: Simplify right side
    487,816.40x = 162,081,377,963.34
  5. Step 5: Solve for x
    x = 162,081,377,963.34/487,816.40
  6. Step 6: Final answer
    x = 332,258.98

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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.