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Finding the Fourth Proportional to 661,888,313.76, 913,376,396.64 and 379,428,259.80

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Solution

The fourth proportional to 661,888,313.76, 913,376,396.64 and 379,428,259.80 is: 523,594,101.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,888,313.76 : 913,376,396.64 = 379,428,259.80 : x
  2. Step 2: Convert to fraction form
    661,888,313.76/913,376,396.64 = 379,428,259.80/x
  3. Step 3: Cross multiply
    661,888,313.76x = 913,376,396.64 × 379,428,259.80
  4. Step 4: Simplify right side
    661,888,313.76x = 346,560,816,719,509,760
  5. Step 5: Solve for x
    x = 346,560,816,719,509,760/661,888,313.76
  6. Step 6: Final answer
    x = 523,594,101.17

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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.