Home / 990,344.32-1,485,516.24-280,378.24

Finding the Fourth Proportional to 990,344.32, 1,485,516.24 and 280,378.24

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Solution

The fourth proportional to 990,344.32, 1,485,516.24 and 280,378.24 is: 420,567.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,344.32 : 1,485,516.24 = 280,378.24 : x
  2. Step 2: Convert to fraction form
    990,344.32/1,485,516.24 = 280,378.24/x
  3. Step 3: Cross multiply
    990,344.32x = 1,485,516.24 × 280,378.24
  4. Step 4: Simplify right side
    990,344.32x = 416,506,428,862.62
  5. Step 5: Solve for x
    x = 416,506,428,862.62/990,344.32
  6. Step 6: Final answer
    x = 420,567.29

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Double scale
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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.