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Finding the Fourth Proportional to 770,390.60, 1,155,251.15 and 365,698.78

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Solution

The fourth proportional to 770,390.60, 1,155,251.15 and 365,698.78 is: 548,389.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,390.60 : 1,155,251.15 = 365,698.78 : x
  2. Step 2: Convert to fraction form
    770,390.60/1,155,251.15 = 365,698.78/x
  3. Step 3: Cross multiply
    770,390.60x = 1,155,251.15 × 365,698.78
  4. Step 4: Simplify right side
    770,390.60x = 422,473,936,148.60
  5. Step 5: Solve for x
    x = 422,473,936,148.60/770,390.60
  6. Step 6: Final answer
    x = 548,389.27

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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.