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Finding the Fourth Proportional to 978,038.60, 1,467,057.90 and 417,129.80

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Solution

The fourth proportional to 978,038.60, 1,467,057.90 and 417,129.80 is: 625,694.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,038.60 : 1,467,057.90 = 417,129.80 : x
  2. Step 2: Convert to fraction form
    978,038.60/1,467,057.90 = 417,129.80/x
  3. Step 3: Cross multiply
    978,038.60x = 1,467,057.90 × 417,129.80
  4. Step 4: Simplify right side
    978,038.60x = 611,953,568,415.42
  5. Step 5: Solve for x
    x = 611,953,568,415.42/978,038.60
  6. Step 6: Final answer
    x = 625,694.70

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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.