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Finding the Fourth Proportional to 780,147.15, 1,170,220.73 and 780,147.15

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Solution

The fourth proportional to 780,147.15, 1,170,220.73 and 780,147.15 is: 1,170,220.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,147.15 : 1,170,220.73 = 780,147.15 : x
  2. Step 2: Convert to fraction form
    780,147.15/1,170,220.73 = 780,147.15/x
  3. Step 3: Cross multiply
    780,147.15x = 1,170,220.73 × 780,147.15
  4. Step 4: Simplify right side
    780,147.15x = 912,944,363,479.68
  5. Step 5: Solve for x
    x = 912,944,363,479.68/780,147.15
  6. Step 6: Final answer
    x = 1,170,220.73

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1.5x scale

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.