Home / 420,429.75-580,205.36-229,455.39

Finding the Fourth Proportional to 420,429.75, 580,205.36 and 229,455.39

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Solution

The fourth proportional to 420,429.75, 580,205.36 and 229,455.39 is: 316,655.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,429.75 : 580,205.36 = 229,455.39 : x
  2. Step 2: Convert to fraction form
    420,429.75/580,205.36 = 229,455.39/x
  3. Step 3: Cross multiply
    420,429.75x = 580,205.36 × 229,455.39
  4. Step 4: Simplify right side
    420,429.75x = 133,131,246,011.61
  5. Step 5: Solve for x
    x = 133,131,246,011.61/420,429.75
  6. Step 6: Final answer
    x = 316,655.15

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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.