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Finding the Fourth Proportional to 280,699.40, 422,085.90 and 235,080.20

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Solution

The fourth proportional to 280,699.40, 422,085.90 and 235,080.20 is: 353,488.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,699.40 : 422,085.90 = 235,080.20 : x
  2. Step 2: Convert to fraction form
    280,699.40/422,085.90 = 235,080.20/x
  3. Step 3: Cross multiply
    280,699.40x = 422,085.90 × 235,080.20
  4. Step 4: Simplify right side
    280,699.40x = 99,224,037,789.18
  5. Step 5: Solve for x
    x = 99,224,037,789.18/280,699.40
  6. Step 6: Final answer
    x = 353,488.60

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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.