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Finding the Fourth Proportional to 978,054.10, 1,467,081.15 and 417,145.30

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Solution

The fourth proportional to 978,054.10, 1,467,081.15 and 417,145.30 is: 625,717.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,054.10 : 1,467,081.15 = 417,145.30 : x
  2. Step 2: Convert to fraction form
    978,054.10/1,467,081.15 = 417,145.30/x
  3. Step 3: Cross multiply
    978,054.10x = 1,467,081.15 × 417,145.30
  4. Step 4: Simplify right side
    978,054.10x = 611,986,006,441.10
  5. Step 5: Solve for x
    x = 611,986,006,441.10/978,054.10
  6. Step 6: Final answer
    x = 625,717.95

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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.