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Finding the Fourth Proportional to 711,360.80, 1,067,818.80 and 445,421.60

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Solution

The fourth proportional to 711,360.80, 1,067,818.80 and 445,421.60 is: 668,619.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,360.80 : 1,067,818.80 = 445,421.60 : x
  2. Step 2: Convert to fraction form
    711,360.80/1,067,818.80 = 445,421.60/x
  3. Step 3: Cross multiply
    711,360.80x = 1,067,818.80 × 445,421.60
  4. Step 4: Simplify right side
    711,360.80x = 475,629,558,406.08
  5. Step 5: Solve for x
    x = 475,629,558,406.08/711,360.80
  6. Step 6: Final answer
    x = 668,619.30

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Double scale
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Similar ratio
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1.5x scale

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.