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Finding the Fourth Proportional to 660,739.60, 991,109.40 and 548,643.70

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Solution

The fourth proportional to 660,739.60, 991,109.40 and 548,643.70 is: 822,965.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,739.60 : 991,109.40 = 548,643.70 : x
  2. Step 2: Convert to fraction form
    660,739.60/991,109.40 = 548,643.70/x
  3. Step 3: Cross multiply
    660,739.60x = 991,109.40 × 548,643.70
  4. Step 4: Simplify right side
    660,739.60x = 543,765,928,320.78
  5. Step 5: Solve for x
    x = 543,765,928,320.78/660,739.60
  6. Step 6: Final answer
    x = 822,965.55

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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.