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Finding the Fourth Proportional to 858,806,400.60, 1,288,209,600.90 and 725,780,813.40

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Solution

The fourth proportional to 858,806,400.60, 1,288,209,600.90 and 725,780,813.40 is: 1,088,671,220.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,806,400.60 : 1,288,209,600.90 = 725,780,813.40 : x
  2. Step 2: Convert to fraction form
    858,806,400.60/1,288,209,600.90 = 725,780,813.40/x
  3. Step 3: Cross multiply
    858,806,400.60x = 1,288,209,600.90 × 725,780,813.40
  4. Step 4: Simplify right side
    858,806,400.60x = 934,957,811,970,891,392
  5. Step 5: Solve for x
    x = 934,957,811,970,891,392/858,806,400.60
  6. Step 6: Final answer
    x = 1,088,671,220.10

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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.