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Finding the Fourth Proportional to 280,245.58, 420,356.61 and 130,434.34

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Solution

The fourth proportional to 280,245.58, 420,356.61 and 130,434.34 is: 195,646.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,245.58 : 420,356.61 = 130,434.34 : x
  2. Step 2: Convert to fraction form
    280,245.58/420,356.61 = 130,434.34/x
  3. Step 3: Cross multiply
    280,245.58x = 420,356.61 × 130,434.34
  4. Step 4: Simplify right side
    280,245.58x = 54,828,936,989.99
  5. Step 5: Solve for x
    x = 54,828,936,989.99/280,245.58
  6. Step 6: Final answer
    x = 195,646.04

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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.