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Finding the Fourth Proportional to 356,287.52, 491,671.80 and 203,374.19

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Solution

The fourth proportional to 356,287.52, 491,671.80 and 203,374.19 is: 280,653.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,287.52 : 491,671.80 = 203,374.19 : x
  2. Step 2: Convert to fraction form
    356,287.52/491,671.80 = 203,374.19/x
  3. Step 3: Cross multiply
    356,287.52x = 491,671.80 × 203,374.19
  4. Step 4: Simplify right side
    356,287.52x = 99,993,355,300.02
  5. Step 5: Solve for x
    x = 99,993,355,300.02/356,287.52
  6. Step 6: Final answer
    x = 280,653.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.