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Finding the Fourth Proportional to 804,605.60, 1,206,908.40 and 431,357.60

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Solution

The fourth proportional to 804,605.60, 1,206,908.40 and 431,357.60 is: 647,036.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,605.60 : 1,206,908.40 = 431,357.60 : x
  2. Step 2: Convert to fraction form
    804,605.60/1,206,908.40 = 431,357.60/x
  3. Step 3: Cross multiply
    804,605.60x = 1,206,908.40 × 431,357.60
  4. Step 4: Simplify right side
    804,605.60x = 520,609,110,843.84
  5. Step 5: Solve for x
    x = 520,609,110,843.84/804,605.60
  6. Step 6: Final answer
    x = 647,036.40

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Similar ratio
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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.