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Finding the Fourth Proportional to 709,907,245.79, 979,722,694.31 and 392,360,660.37

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Solution

The fourth proportional to 709,907,245.79, 979,722,694.31 and 392,360,660.37 is: 541,485,730.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,907,245.79 : 979,722,694.31 = 392,360,660.37 : x
  2. Step 2: Convert to fraction form
    709,907,245.79/979,722,694.31 = 392,360,660.37/x
  3. Step 3: Cross multiply
    709,907,245.79x = 979,722,694.31 × 392,360,660.37
  4. Step 4: Simplify right side
    709,907,245.79x = 384,404,643,316,985,408
  5. Step 5: Solve for x
    x = 384,404,643,316,985,408/709,907,245.79
  6. Step 6: Final answer
    x = 541,485,730.14

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1.5x scale

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.