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Finding the Fourth Proportional to 978,078.60, 1,467,117.90 and 971,857.80

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Solution

The fourth proportional to 978,078.60, 1,467,117.90 and 971,857.80 is: 1,457,786.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,078.60 : 1,467,117.90 = 971,857.80 : x
  2. Step 2: Convert to fraction form
    978,078.60/1,467,117.90 = 971,857.80/x
  3. Step 3: Cross multiply
    978,078.60x = 1,467,117.90 × 971,857.80
  4. Step 4: Simplify right side
    978,078.60x = 1,425,829,974,634.62
  5. Step 5: Solve for x
    x = 1,425,829,974,634.62/978,078.60
  6. Step 6: Final answer
    x = 1,457,786.70

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.