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Finding the Fourth Proportional to 280,599.60, 420,899.40 and 186,121.20

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Solution

The fourth proportional to 280,599.60, 420,899.40 and 186,121.20 is: 279,181.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,599.60 : 420,899.40 = 186,121.20 : x
  2. Step 2: Convert to fraction form
    280,599.60/420,899.40 = 186,121.20/x
  3. Step 3: Cross multiply
    280,599.60x = 420,899.40 × 186,121.20
  4. Step 4: Simplify right side
    280,599.60x = 78,338,301,407.28
  5. Step 5: Solve for x
    x = 78,338,301,407.28/280,599.60
  6. Step 6: Final answer
    x = 279,181.80

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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.