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Finding the Fourth Proportional to 978,177.40, 1,467,266.10 and 659,312.80

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Solution

The fourth proportional to 978,177.40, 1,467,266.10 and 659,312.80 is: 988,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,177.40 : 1,467,266.10 = 659,312.80 : x
  2. Step 2: Convert to fraction form
    978,177.40/1,467,266.10 = 659,312.80/x
  3. Step 3: Cross multiply
    978,177.40x = 1,467,266.10 × 659,312.80
  4. Step 4: Simplify right side
    978,177.40x = 967,387,320,736.08
  5. Step 5: Solve for x
    x = 967,387,320,736.08/978,177.40
  6. Step 6: Final answer
    x = 988,969.20

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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.