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Finding the Fourth Proportional to 647,790.40, 971,224.80 and 248,276.80

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Solution

The fourth proportional to 647,790.40, 971,224.80 and 248,276.80 is: 372,238.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,790.40 : 971,224.80 = 248,276.80 : x
  2. Step 2: Convert to fraction form
    647,790.40/971,224.80 = 248,276.80/x
  3. Step 3: Cross multiply
    647,790.40x = 971,224.80 × 248,276.80
  4. Step 4: Simplify right side
    647,790.40x = 241,132,585,424.64
  5. Step 5: Solve for x
    x = 241,132,585,424.64/647,790.40
  6. Step 6: Final answer
    x = 372,238.59

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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.