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Finding the Fourth Proportional to 875,193.20, 1,312,789.80 and 739,890.80

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Solution

The fourth proportional to 875,193.20, 1,312,789.80 and 739,890.80 is: 1,109,836.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,193.20 : 1,312,789.80 = 739,890.80 : x
  2. Step 2: Convert to fraction form
    875,193.20/1,312,789.80 = 739,890.80/x
  3. Step 3: Cross multiply
    875,193.20x = 1,312,789.80 × 739,890.80
  4. Step 4: Simplify right side
    875,193.20x = 971,321,095,353.84
  5. Step 5: Solve for x
    x = 971,321,095,353.84/875,193.20
  6. Step 6: Final answer
    x = 1,109,836.20

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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.