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Finding the Fourth Proportional to 643,392.40, 966,010.20 and 363,456.40

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Solution

The fourth proportional to 643,392.40, 966,010.20 and 363,456.40 is: 545,705.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,392.40 : 966,010.20 = 363,456.40 : x
  2. Step 2: Convert to fraction form
    643,392.40/966,010.20 = 363,456.40/x
  3. Step 3: Cross multiply
    643,392.40x = 966,010.20 × 363,456.40
  4. Step 4: Simplify right side
    643,392.40x = 351,102,589,655.28
  5. Step 5: Solve for x
    x = 351,102,589,655.28/643,392.40
  6. Step 6: Final answer
    x = 545,705.22

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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.