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Finding the Fourth Proportional to 643,366.50, 964,376.33 and 216,754.90

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Solution

The fourth proportional to 643,366.50, 964,376.33 and 216,754.90 is: 324,905.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,366.50 : 964,376.33 = 216,754.90 : x
  2. Step 2: Convert to fraction form
    643,366.50/964,376.33 = 216,754.90/x
  3. Step 3: Cross multiply
    643,366.50x = 964,376.33 × 216,754.90
  4. Step 4: Simplify right side
    643,366.50x = 209,033,294,052.20
  5. Step 5: Solve for x
    x = 209,033,294,052.20/643,366.50
  6. Step 6: Final answer
    x = 324,905.47

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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.