Home / 643,918.40-966,007.20-223,107.20

Finding the Fourth Proportional to 643,918.40, 966,007.20 and 223,107.20

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Solution

The fourth proportional to 643,918.40, 966,007.20 and 223,107.20 is: 334,705.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,918.40 : 966,007.20 = 223,107.20 : x
  2. Step 2: Convert to fraction form
    643,918.40/966,007.20 = 223,107.20/x
  3. Step 3: Cross multiply
    643,918.40x = 966,007.20 × 223,107.20
  4. Step 4: Simplify right side
    643,918.40x = 215,523,161,571.84
  5. Step 5: Solve for x
    x = 215,523,161,571.84/643,918.40
  6. Step 6: Final answer
    x = 334,705.70

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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.