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Finding the Fourth Proportional to 647,562.20, 971,343.30 and 398,384.60

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Solution

The fourth proportional to 647,562.20, 971,343.30 and 398,384.60 is: 597,576.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,562.20 : 971,343.30 = 398,384.60 : x
  2. Step 2: Convert to fraction form
    647,562.20/971,343.30 = 398,384.60/x
  3. Step 3: Cross multiply
    647,562.20x = 971,343.30 × 398,384.60
  4. Step 4: Simplify right side
    647,562.20x = 386,968,212,033.18
  5. Step 5: Solve for x
    x = 386,968,212,033.18/647,562.20
  6. Step 6: Final answer
    x = 597,576.90

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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.