Home / 1,286,940.80-1,930,411.20-815,715.20

Finding the Fourth Proportional to 1,286,940.80, 1,930,411.20 and 815,715.20

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Solution

The fourth proportional to 1,286,940.80, 1,930,411.20 and 815,715.20 is: 1,223,572.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,940.80 : 1,930,411.20 = 815,715.20 : x
  2. Step 2: Convert to fraction form
    1,286,940.80/1,930,411.20 = 815,715.20/x
  3. Step 3: Cross multiply
    1,286,940.80x = 1,930,411.20 × 815,715.20
  4. Step 4: Simplify right side
    1,286,940.80x = 1,574,665,758,090.24
  5. Step 5: Solve for x
    x = 1,574,665,758,090.24/1,286,940.80
  6. Step 6: Final answer
    x = 1,223,572.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.