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Finding the Fourth Proportional to 916,321.60, 1,372,149.60 and 874,331.20

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Solution

The fourth proportional to 916,321.60, 1,372,149.60 and 874,331.20 is: 1,309,270.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,321.60 : 1,372,149.60 = 874,331.20 : x
  2. Step 2: Convert to fraction form
    916,321.60/1,372,149.60 = 874,331.20/x
  3. Step 3: Cross multiply
    916,321.60x = 1,372,149.60 × 874,331.20
  4. Step 4: Simplify right side
    916,321.60x = 1,199,713,206,347.52
  5. Step 5: Solve for x
    x = 1,199,713,206,347.52/916,321.60
  6. Step 6: Final answer
    x = 1,309,270.90

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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.