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Finding the Fourth Proportional to 1,292,916.70, 1,784,224.95 and 749,367.78

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Solution

The fourth proportional to 1,292,916.70, 1,784,224.95 and 749,367.78 is: 1,034,127.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,916.70 : 1,784,224.95 = 749,367.78 : x
  2. Step 2: Convert to fraction form
    1,292,916.70/1,784,224.95 = 749,367.78/x
  3. Step 3: Cross multiply
    1,292,916.70x = 1,784,224.95 × 749,367.78
  4. Step 4: Simplify right side
    1,292,916.70x = 1,337,040,689,802.11
  5. Step 5: Solve for x
    x = 1,337,040,689,802.11/1,292,916.70
  6. Step 6: Final answer
    x = 1,034,127.48

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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.