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Finding the Fourth Proportional to 714,733,717.79, 986,356,481 and 397,207,344.57

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Solution

The fourth proportional to 714,733,717.79, 986,356,481 and 397,207,344.57 is: 548,159,445.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,733,717.79 : 986,356,481 = 397,207,344.57 : x
  2. Step 2: Convert to fraction form
    714,733,717.79/986,356,481 = 397,207,344.57/x
  3. Step 3: Cross multiply
    714,733,717.79x = 986,356,481 × 397,207,344.57
  4. Step 4: Simplify right side
    714,733,717.79x = 391,788,038,617,419,648
  5. Step 5: Solve for x
    x = 391,788,038,617,419,648/714,733,717.79
  6. Step 6: Final answer
    x = 548,159,445.77

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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.