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Finding the Fourth Proportional to 1,211,488.60, 1,815,264.60 and 1,042,214.80

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Solution

The fourth proportional to 1,211,488.60, 1,815,264.60 and 1,042,214.80 is: 1,561,628.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,488.60 : 1,815,264.60 = 1,042,214.80 : x
  2. Step 2: Convert to fraction form
    1,211,488.60/1,815,264.60 = 1,042,214.80/x
  3. Step 3: Cross multiply
    1,211,488.60x = 1,815,264.60 × 1,042,214.80
  4. Step 4: Simplify right side
    1,211,488.60x = 1,891,895,632,036.08
  5. Step 5: Solve for x
    x = 1,891,895,632,036.08/1,211,488.60
  6. Step 6: Final answer
    x = 1,561,628.92

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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.