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Finding the Fourth Proportional to 709,170,579.08, 978,916,549.78 and 426,926,138.68

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Solution

The fourth proportional to 709,170,579.08, 978,916,549.78 and 426,926,138.68 is: 589,315,286.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,170,579.08 : 978,916,549.78 = 426,926,138.68 : x
  2. Step 2: Convert to fraction form
    709,170,579.08/978,916,549.78 = 426,926,138.68/x
  3. Step 3: Cross multiply
    709,170,579.08x = 978,916,549.78 × 426,926,138.68
  4. Step 4: Simplify right side
    709,170,579.08x = 417,925,062,687,523,392
  5. Step 5: Solve for x
    x = 417,925,062,687,523,392/709,170,579.08
  6. Step 6: Final answer
    x = 589,315,286.08

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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.