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Finding the Fourth Proportional to 643,920.40, 966,010.20 and 223,109.20

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Solution

The fourth proportional to 643,920.40, 966,010.20 and 223,109.20 is: 334,708.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,920.40 : 966,010.20 = 223,109.20 : x
  2. Step 2: Convert to fraction form
    643,920.40/966,010.20 = 223,109.20/x
  3. Step 3: Cross multiply
    643,920.40x = 966,010.20 × 223,109.20
  4. Step 4: Simplify right side
    643,920.40x = 215,525,762,913.84
  5. Step 5: Solve for x
    x = 215,525,762,913.84/643,920.40
  6. Step 6: Final answer
    x = 334,708.70

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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.