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Finding the Fourth Proportional to 872,028.90, 1,218,041.10 and 872,028.90

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Solution

The fourth proportional to 872,028.90, 1,218,041.10 and 872,028.90 is: 1,218,041.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,028.90 : 1,218,041.10 = 872,028.90 : x
  2. Step 2: Convert to fraction form
    872,028.90/1,218,041.10 = 872,028.90/x
  3. Step 3: Cross multiply
    872,028.90x = 1,218,041.10 × 872,028.90
  4. Step 4: Simplify right side
    872,028.90x = 1,062,167,040,587.79
  5. Step 5: Solve for x
    x = 1,062,167,040,587.79/872,028.90
  6. Step 6: Final answer
    x = 1,218,041.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.