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Finding the Fourth Proportional to 648,007.20, 971,719.20 and 248,515.20

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Solution

The fourth proportional to 648,007.20, 971,719.20 and 248,515.20 is: 372,660.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,007.20 : 971,719.20 = 248,515.20 : x
  2. Step 2: Convert to fraction form
    648,007.20/971,719.20 = 248,515.20/x
  3. Step 3: Cross multiply
    648,007.20x = 971,719.20 × 248,515.20
  4. Step 4: Simplify right side
    648,007.20x = 241,486,991,331.84
  5. Step 5: Solve for x
    x = 241,486,991,331.84/648,007.20
  6. Step 6: Final answer
    x = 372,660.97

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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.