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Finding the Fourth Proportional to 978,636.60, 1,467,954.90 and 680,038.20

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Solution

The fourth proportional to 978,636.60, 1,467,954.90 and 680,038.20 is: 1,020,057.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,636.60 : 1,467,954.90 = 680,038.20 : x
  2. Step 2: Convert to fraction form
    978,636.60/1,467,954.90 = 680,038.20/x
  3. Step 3: Cross multiply
    978,636.60x = 1,467,954.90 × 680,038.20
  4. Step 4: Simplify right side
    978,636.60x = 998,265,407,877.18
  5. Step 5: Solve for x
    x = 998,265,407,877.18/978,636.60
  6. Step 6: Final answer
    x = 1,020,057.30

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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.