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Finding the Fourth Proportional to 647,478.20, 970,925.70 and 247,986.20

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Solution

The fourth proportional to 647,478.20, 970,925.70 and 247,986.20 is: 371,867.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,478.20 : 970,925.70 = 247,986.20 : x
  2. Step 2: Convert to fraction form
    647,478.20/970,925.70 = 247,986.20/x
  3. Step 3: Cross multiply
    647,478.20x = 970,925.70 × 247,986.20
  4. Step 4: Simplify right side
    647,478.20x = 240,776,174,825.34
  5. Step 5: Solve for x
    x = 240,776,174,825.34/647,478.20
  6. Step 6: Final answer
    x = 371,867.62

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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.