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Finding the Fourth Proportional to 647,958.80, 971,938.20 and 448,223.60

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Solution

The fourth proportional to 647,958.80, 971,938.20 and 448,223.60 is: 672,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,958.80 : 971,938.20 = 448,223.60 : x
  2. Step 2: Convert to fraction form
    647,958.80/971,938.20 = 448,223.60/x
  3. Step 3: Cross multiply
    647,958.80x = 971,938.20 × 448,223.60
  4. Step 4: Simplify right side
    647,958.80x = 435,645,638,981.52
  5. Step 5: Solve for x
    x = 435,645,638,981.52/647,958.80
  6. Step 6: Final answer
    x = 672,335.40

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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.