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Finding the Fourth Proportional to 1,214,854.80, 1,822,282.20 and 816,723.60

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Solution

The fourth proportional to 1,214,854.80, 1,822,282.20 and 816,723.60 is: 1,225,085.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,854.80 : 1,822,282.20 = 816,723.60 : x
  2. Step 2: Convert to fraction form
    1,214,854.80/1,822,282.20 = 816,723.60/x
  3. Step 3: Cross multiply
    1,214,854.80x = 1,822,282.20 × 816,723.60
  4. Step 4: Simplify right side
    1,214,854.80x = 1,488,300,878,599.92
  5. Step 5: Solve for x
    x = 1,488,300,878,599.92/1,214,854.80
  6. Step 6: Final answer
    x = 1,225,085.40

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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.