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Finding the Fourth Proportional to 647,987.10, 971,519.49 and 248,289.90

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Solution

The fourth proportional to 647,987.10, 971,519.49 and 248,289.90 is: 372,258.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,987.10 : 971,519.49 = 248,289.90 : x
  2. Step 2: Convert to fraction form
    647,987.10/971,519.49 = 248,289.90/x
  3. Step 3: Cross multiply
    647,987.10x = 971,519.49 × 248,289.90
  4. Step 4: Simplify right side
    647,987.10x = 241,218,477,020.15
  5. Step 5: Solve for x
    x = 241,218,477,020.15/647,987.10
  6. Step 6: Final answer
    x = 372,258.15

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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.