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Finding the Fourth Proportional to 2,605,900,801.60, 3,909,418,072.80 and 858,806,228.80

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Solution

The fourth proportional to 2,605,900,801.60, 3,909,418,072.80 and 858,806,228.80 is: 1,288,396,162.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605,900,801.60 : 3,909,418,072.80 = 858,806,228.80 : x
  2. Step 2: Convert to fraction form
    2,605,900,801.60/3,909,418,072.80 = 858,806,228.80/x
  3. Step 3: Cross multiply
    2,605,900,801.60x = 3,909,418,072.80 × 858,806,228.80
  4. Step 4: Simplify right side
    2,605,900,801.60x = 3,357,432,591,903,931,904
  5. Step 5: Solve for x
    x = 3,357,432,591,903,931,904/2,605,900,801.60
  6. Step 6: Final answer
    x = 1,288,396,162.22

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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.