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Finding the Fourth Proportional to 643,358.40, 965,959.20 and 363,422.40

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Solution

The fourth proportional to 643,358.40, 965,959.20 and 363,422.40 is: 545,654.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,358.40 : 965,959.20 = 363,422.40 : x
  2. Step 2: Convert to fraction form
    643,358.40/965,959.20 = 363,422.40/x
  3. Step 3: Cross multiply
    643,358.40x = 965,959.20 × 363,422.40
  4. Step 4: Simplify right side
    643,358.40x = 351,051,210,766.08
  5. Step 5: Solve for x
    x = 351,051,210,766.08/643,358.40
  6. Step 6: Final answer
    x = 545,654.20

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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.