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Finding the Fourth Proportional to 875,109.20, 1,312,663.80 and 800,313.80

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Solution

The fourth proportional to 875,109.20, 1,312,663.80 and 800,313.80 is: 1,200,470.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,109.20 : 1,312,663.80 = 800,313.80 : x
  2. Step 2: Convert to fraction form
    875,109.20/1,312,663.80 = 800,313.80/x
  3. Step 3: Cross multiply
    875,109.20x = 1,312,663.80 × 800,313.80
  4. Step 4: Simplify right side
    875,109.20x = 1,050,542,953,900.44
  5. Step 5: Solve for x
    x = 1,050,542,953,900.44/875,109.20
  6. Step 6: Final answer
    x = 1,200,470.70

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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.