Home / 1,368,123.40-1,888,371.86-787,418

Finding the Fourth Proportional to 1,368,123.40, 1,888,371.86 and 787,418

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Solution

The fourth proportional to 1,368,123.40, 1,888,371.86 and 787,418 is: 1,086,844.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368,123.40 : 1,888,371.86 = 787,418 : x
  2. Step 2: Convert to fraction form
    1,368,123.40/1,888,371.86 = 787,418/x
  3. Step 3: Cross multiply
    1,368,123.40x = 1,888,371.86 × 787,418
  4. Step 4: Simplify right side
    1,368,123.40x = 1,486,937,993,257.48
  5. Step 5: Solve for x
    x = 1,486,937,993,257.48/1,368,123.40
  6. Step 6: Final answer
    x = 1,086,844.94

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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.