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Finding the Fourth Proportional to 1,259,498.80, 1,888,019.40 and 1,126,788.40

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Solution

The fourth proportional to 1,259,498.80, 1,888,019.40 and 1,126,788.40 is: 1,689,083.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,498.80 : 1,888,019.40 = 1,126,788.40 : x
  2. Step 2: Convert to fraction form
    1,259,498.80/1,888,019.40 = 1,126,788.40/x
  3. Step 3: Cross multiply
    1,259,498.80x = 1,888,019.40 × 1,126,788.40
  4. Step 4: Simplify right side
    1,259,498.80x = 2,127,398,358,894.96
  5. Step 5: Solve for x
    x = 2,127,398,358,894.96/1,259,498.80
  6. Step 6: Final answer
    x = 1,689,083.28

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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.