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Finding the Fourth Proportional to 990,561.60, 1,485,842.40 and 280,580.40

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Solution

The fourth proportional to 990,561.60, 1,485,842.40 and 280,580.40 is: 420,870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,561.60 : 1,485,842.40 = 280,580.40 : x
  2. Step 2: Convert to fraction form
    990,561.60/1,485,842.40 = 280,580.40/x
  3. Step 3: Cross multiply
    990,561.60x = 1,485,842.40 × 280,580.40
  4. Step 4: Simplify right side
    990,561.60x = 416,898,254,928.96
  5. Step 5: Solve for x
    x = 416,898,254,928.96/990,561.60
  6. Step 6: Final answer
    x = 420,870.60

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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.