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Finding the Fourth Proportional to 660,388.80, 990,583.20 and 565,910.40

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Solution

The fourth proportional to 660,388.80, 990,583.20 and 565,910.40 is: 848,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,388.80 : 990,583.20 = 565,910.40 : x
  2. Step 2: Convert to fraction form
    660,388.80/990,583.20 = 565,910.40/x
  3. Step 3: Cross multiply
    660,388.80x = 990,583.20 × 565,910.40
  4. Step 4: Simplify right side
    660,388.80x = 560,581,334,945.28
  5. Step 5: Solve for x
    x = 560,581,334,945.28/660,388.80
  6. Step 6: Final answer
    x = 848,865.60

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Similar ratio
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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.