Home / 1,223,916.57-1,688,461.47-815,620.68

Finding the Fourth Proportional to 1,223,916.57, 1,688,461.47 and 815,620.68

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Solution

The fourth proportional to 1,223,916.57, 1,688,461.47 and 815,620.68 is: 1,125,194.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,916.57 : 1,688,461.47 = 815,620.68 : x
  2. Step 2: Convert to fraction form
    1,223,916.57/1,688,461.47 = 815,620.68/x
  3. Step 3: Cross multiply
    1,223,916.57x = 1,688,461.47 × 815,620.68
  4. Step 4: Simplify right side
    1,223,916.57x = 1,377,144,092,315.20
  5. Step 5: Solve for x
    x = 1,377,144,092,315.20/1,223,916.57
  6. Step 6: Final answer
    x = 1,125,194.42

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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.