Home / 513,820,308.74-709,072,727.69-278,870,972.45

Finding the Fourth Proportional to 513,820,308.74, 709,072,727.69 and 278,870,972.45

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Solution

The fourth proportional to 513,820,308.74, 709,072,727.69 and 278,870,972.45 is: 384,842,322.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,820,308.74 : 709,072,727.69 = 278,870,972.45 : x
  2. Step 2: Convert to fraction form
    513,820,308.74/709,072,727.69 = 278,870,972.45/x
  3. Step 3: Cross multiply
    513,820,308.74x = 709,072,727.69 × 278,870,972.45
  4. Step 4: Simplify right side
    513,820,308.74x = 197,739,801,105,836,160
  5. Step 5: Solve for x
    x = 197,739,801,105,836,160/513,820,308.74
  6. Step 6: Final answer
    x = 384,842,322.78

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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.