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Finding the Fourth Proportional to 978,099.05, 1,348,217.07 and 771,029.78

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Solution

The fourth proportional to 978,099.05, 1,348,217.07 and 771,029.78 is: 1,062,791.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,099.05 : 1,348,217.07 = 771,029.78 : x
  2. Step 2: Convert to fraction form
    978,099.05/1,348,217.07 = 771,029.78/x
  3. Step 3: Cross multiply
    978,099.05x = 1,348,217.07 × 771,029.78
  4. Step 4: Simplify right side
    978,099.05x = 1,039,515,514,244.89
  5. Step 5: Solve for x
    x = 1,039,515,514,244.89/978,099.05
  6. Step 6: Final answer
    x = 1,062,791.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.