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Finding the Fourth Proportional to 647,405.20, 971,107.80 and 247,840.30

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Solution

The fourth proportional to 647,405.20, 971,107.80 and 247,840.30 is: 371,760.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,405.20 : 971,107.80 = 247,840.30 : x
  2. Step 2: Convert to fraction form
    647,405.20/971,107.80 = 247,840.30/x
  3. Step 3: Cross multiply
    647,405.20x = 971,107.80 × 247,840.30
  4. Step 4: Simplify right side
    647,405.20x = 240,679,648,484.34
  5. Step 5: Solve for x
    x = 240,679,648,484.34/647,405.20
  6. Step 6: Final answer
    x = 371,760.45

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Similar ratio
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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.