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Finding the Fourth Proportional to 1,399,579.04, 1,931,604.24 and 787,850.24

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Solution

The fourth proportional to 1,399,579.04, 1,931,604.24 and 787,850.24 is: 1,087,337.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,579.04 : 1,931,604.24 = 787,850.24 : x
  2. Step 2: Convert to fraction form
    1,399,579.04/1,931,604.24 = 787,850.24/x
  3. Step 3: Cross multiply
    1,399,579.04x = 1,931,604.24 × 787,850.24
  4. Step 4: Simplify right side
    1,399,579.04x = 1,521,814,864,069.02
  5. Step 5: Solve for x
    x = 1,521,814,864,069.02/1,399,579.04
  6. Step 6: Final answer
    x = 1,087,337.56

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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.