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Finding the Fourth Proportional to 1,289,834.80, 1,933,830.60 and 579,281.20

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Solution

The fourth proportional to 1,289,834.80, 1,933,830.60 and 579,281.20 is: 868,507.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,834.80 : 1,933,830.60 = 579,281.20 : x
  2. Step 2: Convert to fraction form
    1,289,834.80/1,933,830.60 = 579,281.20/x
  3. Step 3: Cross multiply
    1,289,834.80x = 1,933,830.60 × 579,281.20
  4. Step 4: Simplify right side
    1,289,834.80x = 1,120,231,710,564.72
  5. Step 5: Solve for x
    x = 1,120,231,710,564.72/1,289,834.80
  6. Step 6: Final answer
    x = 868,507.90

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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.