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Finding the Fourth Proportional to 978,465.20, 1,465,948.20 and 827,999.60

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Solution

The fourth proportional to 978,465.20, 1,465,948.20 and 827,999.60 is: 1,240,518.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,465.20 : 1,465,948.20 = 827,999.60 : x
  2. Step 2: Convert to fraction form
    978,465.20/1,465,948.20 = 827,999.60/x
  3. Step 3: Cross multiply
    978,465.20x = 1,465,948.20 × 827,999.60
  4. Step 4: Simplify right side
    978,465.20x = 1,213,804,523,220.72
  5. Step 5: Solve for x
    x = 1,213,804,523,220.72/978,465.20
  6. Step 6: Final answer
    x = 1,240,518.85

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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.