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Finding the Fourth Proportional to 978,078.10, 1,467,117.15 and 971,857.30

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Solution

The fourth proportional to 978,078.10, 1,467,117.15 and 971,857.30 is: 1,457,785.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,078.10 : 1,467,117.15 = 971,857.30 : x
  2. Step 2: Convert to fraction form
    978,078.10/1,467,117.15 = 971,857.30/x
  3. Step 3: Cross multiply
    978,078.10x = 1,467,117.15 × 971,857.30
  4. Step 4: Simplify right side
    978,078.10x = 1,425,828,512,182.70
  5. Step 5: Solve for x
    x = 1,425,828,512,182.70/978,078.10
  6. Step 6: Final answer
    x = 1,457,785.95

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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.