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Finding the Fourth Proportional to 652,892,642.20, 978,063,504.90 and 393,336,857.80

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Solution

The fourth proportional to 652,892,642.20, 978,063,504.90 and 393,336,857.80 is: 589,236,883.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,892,642.20 : 978,063,504.90 = 393,336,857.80 : x
  2. Step 2: Convert to fraction form
    652,892,642.20/978,063,504.90 = 393,336,857.80/x
  3. Step 3: Cross multiply
    652,892,642.20x = 978,063,504.90 × 393,336,857.80
  4. Step 4: Simplify right side
    652,892,642.20x = 384,708,425,746,220,928
  5. Step 5: Solve for x
    x = 384,708,425,746,220,928/652,892,642.20
  6. Step 6: Final answer
    x = 589,236,883.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.