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Finding the Fourth Proportional to 1,931,311.60, 2,897,658.60 and 809,724.40

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Solution

The fourth proportional to 1,931,311.60, 2,897,658.60 and 809,724.40 is: 1,214,876.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931,311.60 : 2,897,658.60 = 809,724.40 : x
  2. Step 2: Convert to fraction form
    1,931,311.60/2,897,658.60 = 809,724.40/x
  3. Step 3: Cross multiply
    1,931,311.60x = 2,897,658.60 × 809,724.40
  4. Step 4: Simplify right side
    1,931,311.60x = 2,346,304,871,289.84
  5. Step 5: Solve for x
    x = 2,346,304,871,289.84/1,931,311.60
  6. Step 6: Final answer
    x = 1,214,876.39

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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.