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Finding the Fourth Proportional to 1,247,815.05, 1,721,984.76 and 674,855.22

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Solution

The fourth proportional to 1,247,815.05, 1,721,984.76 and 674,855.22 is: 931,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,815.05 : 1,721,984.76 = 674,855.22 : x
  2. Step 2: Convert to fraction form
    1,247,815.05/1,721,984.76 = 674,855.22/x
  3. Step 3: Cross multiply
    1,247,815.05x = 1,721,984.76 × 674,855.22
  4. Step 4: Simplify right side
    1,247,815.05x = 1,162,090,404,711.76
  5. Step 5: Solve for x
    x = 1,162,090,404,711.76/1,247,815.05
  6. Step 6: Final answer
    x = 931,300.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.