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Finding the Fourth Proportional to 870,896.76, 1,306,427.76 and 338,458.92

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Solution

The fourth proportional to 870,896.76, 1,306,427.76 and 338,458.92 is: 507,720.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,896.76 : 1,306,427.76 = 338,458.92 : x
  2. Step 2: Convert to fraction form
    870,896.76/1,306,427.76 = 338,458.92/x
  3. Step 3: Cross multiply
    870,896.76x = 1,306,427.76 × 338,458.92
  4. Step 4: Simplify right side
    870,896.76x = 442,172,128,707.62
  5. Step 5: Solve for x
    x = 442,172,128,707.62/870,896.76
  6. Step 6: Final answer
    x = 507,720.49

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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.