Home / 1,388,792.36-1,916,516.22-815,884.76

Finding the Fourth Proportional to 1,388,792.36, 1,916,516.22 and 815,884.76

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Solution

The fourth proportional to 1,388,792.36, 1,916,516.22 and 815,884.76 is: 1,125,910.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,792.36 : 1,916,516.22 = 815,884.76 : x
  2. Step 2: Convert to fraction form
    1,388,792.36/1,916,516.22 = 815,884.76/x
  3. Step 3: Cross multiply
    1,388,792.36x = 1,916,516.22 × 815,884.76
  4. Step 4: Simplify right side
    1,388,792.36x = 1,563,656,376,190.81
  5. Step 5: Solve for x
    x = 1,563,656,376,190.81/1,388,792.36
  6. Step 6: Final answer
    x = 1,125,910.84

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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.