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Finding the Fourth Proportional to 978,503.60, 1,467,755.40 and 679,905.20

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Solution

The fourth proportional to 978,503.60, 1,467,755.40 and 679,905.20 is: 1,019,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,503.60 : 1,467,755.40 = 679,905.20 : x
  2. Step 2: Convert to fraction form
    978,503.60/1,467,755.40 = 679,905.20/x
  3. Step 3: Cross multiply
    978,503.60x = 1,467,755.40 × 679,905.20
  4. Step 4: Simplify right side
    978,503.60x = 997,934,528,788.08
  5. Step 5: Solve for x
    x = 997,934,528,788.08/978,503.60
  6. Step 6: Final answer
    x = 1,019,857.80

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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.