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Finding the Fourth Proportional to 876,409.76, 1,311,155.76 and 663,790.32

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Solution

The fourth proportional to 876,409.76, 1,311,155.76 and 663,790.32 is: 993,065.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,409.76 : 1,311,155.76 = 663,790.32 : x
  2. Step 2: Convert to fraction form
    876,409.76/1,311,155.76 = 663,790.32/x
  3. Step 3: Cross multiply
    876,409.76x = 1,311,155.76 × 663,790.32
  4. Step 4: Simplify right side
    876,409.76x = 870,332,501,500.24
  5. Step 5: Solve for x
    x = 870,332,501,500.24/876,409.76
  6. Step 6: Final answer
    x = 993,065.73

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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.