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Finding the Fourth Proportional to 978,487.40, 1,467,731.10 and 659,622.80

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Solution

The fourth proportional to 978,487.40, 1,467,731.10 and 659,622.80 is: 989,434.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,487.40 : 1,467,731.10 = 659,622.80 : x
  2. Step 2: Convert to fraction form
    978,487.40/1,467,731.10 = 659,622.80/x
  3. Step 3: Cross multiply
    978,487.40x = 1,467,731.10 × 659,622.80
  4. Step 4: Simplify right side
    978,487.40x = 968,148,897,829.08
  5. Step 5: Solve for x
    x = 968,148,897,829.08/978,487.40
  6. Step 6: Final answer
    x = 989,434.20

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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.