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Finding the Fourth Proportional to 647,690.40, 971,535.60 and 198,410.40

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Solution

The fourth proportional to 647,690.40, 971,535.60 and 198,410.40 is: 297,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,690.40 : 971,535.60 = 198,410.40 : x
  2. Step 2: Convert to fraction form
    647,690.40/971,535.60 = 198,410.40/x
  3. Step 3: Cross multiply
    647,690.40x = 971,535.60 × 198,410.40
  4. Step 4: Simplify right side
    647,690.40x = 192,762,767,010.24
  5. Step 5: Solve for x
    x = 192,762,767,010.24/647,690.40
  6. Step 6: Final answer
    x = 297,615.60

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Similar ratio
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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.