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Finding the Fourth Proportional to 711,400.80, 1,067,878.80 and 445,461.60

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Solution

The fourth proportional to 711,400.80, 1,067,878.80 and 445,461.60 is: 668,679.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,400.80 : 1,067,878.80 = 445,461.60 : x
  2. Step 2: Convert to fraction form
    711,400.80/1,067,878.80 = 445,461.60/x
  3. Step 3: Cross multiply
    711,400.80x = 1,067,878.80 × 445,461.60
  4. Step 4: Simplify right side
    711,400.80x = 475,698,998,854.08
  5. Step 5: Solve for x
    x = 475,698,998,854.08/711,400.80
  6. Step 6: Final answer
    x = 668,679.31

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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.