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Finding the Fourth Proportional to 1,931,168.40, 2,897,789.40 and 809,350.80

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Solution

The fourth proportional to 1,931,168.40, 2,897,789.40 and 809,350.80 is: 1,214,460.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931,168.40 : 2,897,789.40 = 809,350.80 : x
  2. Step 2: Convert to fraction form
    1,931,168.40/2,897,789.40 = 809,350.80/x
  3. Step 3: Cross multiply
    1,931,168.40x = 2,897,789.40 × 809,350.80
  4. Step 4: Simplify right side
    1,931,168.40x = 2,345,328,169,121.52
  5. Step 5: Solve for x
    x = 2,345,328,169,121.52/1,931,168.40
  6. Step 6: Final answer
    x = 1,214,460.72

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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.