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Finding the Fourth Proportional to 978,345.20, 1,467,517.80 and 446,904.20

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Solution

The fourth proportional to 978,345.20, 1,467,517.80 and 446,904.20 is: 670,356.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,345.20 : 1,467,517.80 = 446,904.20 : x
  2. Step 2: Convert to fraction form
    978,345.20/1,467,517.80 = 446,904.20/x
  3. Step 3: Cross multiply
    978,345.20x = 1,467,517.80 × 446,904.20
  4. Step 4: Simplify right side
    978,345.20x = 655,839,868,394.76
  5. Step 5: Solve for x
    x = 655,839,868,394.76/978,345.20
  6. Step 6: Final answer
    x = 670,356.30

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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.