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Finding the Fourth Proportional to 280,299.60, 420,449.40 and 154,328.40

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Solution

The fourth proportional to 280,299.60, 420,449.40 and 154,328.40 is: 231,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,299.60 : 420,449.40 = 154,328.40 : x
  2. Step 2: Convert to fraction form
    280,299.60/420,449.40 = 154,328.40/x
  3. Step 3: Cross multiply
    280,299.60x = 420,449.40 × 154,328.40
  4. Step 4: Simplify right side
    280,299.60x = 64,887,283,182.96
  5. Step 5: Solve for x
    x = 64,887,283,182.96/280,299.60
  6. Step 6: Final answer
    x = 231,492.60

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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.