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Finding the Fourth Proportional to 643,390.40, 966,007.20 and 363,454.40

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Solution

The fourth proportional to 643,390.40, 966,007.20 and 363,454.40 is: 545,702.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,390.40 : 966,007.20 = 363,454.40 : x
  2. Step 2: Convert to fraction form
    643,390.40/966,007.20 = 363,454.40/x
  3. Step 3: Cross multiply
    643,390.40x = 966,007.20 × 363,454.40
  4. Step 4: Simplify right side
    643,390.40x = 351,099,567,271.68
  5. Step 5: Solve for x
    x = 351,099,567,271.68/643,390.40
  6. Step 6: Final answer
    x = 545,702.22

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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.