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Finding the Fourth Proportional to 858,646,078.65, 1,287,969,117.98 and 858,646,078.65

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Solution

The fourth proportional to 858,646,078.65, 1,287,969,117.98 and 858,646,078.65 is: 1,287,969,117.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,646,078.65 : 1,287,969,117.98 = 858,646,078.65 : x
  2. Step 2: Convert to fraction form
    858,646,078.65/1,287,969,117.98 = 858,646,078.65/x
  3. Step 3: Cross multiply
    858,646,078.65x = 1,287,969,117.98 × 858,646,078.65
  4. Step 4: Simplify right side
    858,646,078.65x = 1,105,909,632,571,532,928
  5. Step 5: Solve for x
    x = 1,105,909,632,571,532,928/858,646,078.65
  6. Step 6: Final answer
    x = 1,287,969,117.98

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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.