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Finding the Fourth Proportional to 709,170,579.58, 978,916,550.47 and 426,926,139.18

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Solution

The fourth proportional to 709,170,579.58, 978,916,550.47 and 426,926,139.18 is: 589,315,286.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,170,579.58 : 978,916,550.47 = 426,926,139.18 : x
  2. Step 2: Convert to fraction form
    709,170,579.58/978,916,550.47 = 426,926,139.18/x
  3. Step 3: Cross multiply
    709,170,579.58x = 978,916,550.47 × 426,926,139.18
  4. Step 4: Simplify right side
    709,170,579.58x = 417,925,063,471,560,704
  5. Step 5: Solve for x
    x = 417,925,063,471,560,704/709,170,579.58
  6. Step 6: Final answer
    x = 589,315,286.77

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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.