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Finding the Fourth Proportional to 978,438.40, 1,467,657.60 and 695,003.20

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Solution

The fourth proportional to 978,438.40, 1,467,657.60 and 695,003.20 is: 1,042,504.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,438.40 : 1,467,657.60 = 695,003.20 : x
  2. Step 2: Convert to fraction form
    978,438.40/1,467,657.60 = 695,003.20/x
  3. Step 3: Cross multiply
    978,438.40x = 1,467,657.60 × 695,003.20
  4. Step 4: Simplify right side
    978,438.40x = 1,020,026,728,504.32
  5. Step 5: Solve for x
    x = 1,020,026,728,504.32/978,438.40
  6. Step 6: Final answer
    x = 1,042,504.80

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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.