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Finding the Fourth Proportional to 643,887.40, 965,960.70 and 223,076.20

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Solution

The fourth proportional to 643,887.40, 965,960.70 and 223,076.20 is: 334,659.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,887.40 : 965,960.70 = 223,076.20 : x
  2. Step 2: Convert to fraction form
    643,887.40/965,960.70 = 223,076.20/x
  3. Step 3: Cross multiply
    643,887.40x = 965,960.70 × 223,076.20
  4. Step 4: Simplify right side
    643,887.40x = 215,482,842,305.34
  5. Step 5: Solve for x
    x = 215,482,842,305.34/643,887.40
  6. Step 6: Final answer
    x = 334,659.20

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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.