Home / 280,344.27-420,580.80-80,666.31

Finding the Fourth Proportional to 280,344.27, 420,580.80 and 80,666.31

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Solution

The fourth proportional to 280,344.27, 420,580.80 and 80,666.31 is: 121,017.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,344.27 : 420,580.80 = 80,666.31 : x
  2. Step 2: Convert to fraction form
    280,344.27/420,580.80 = 80,666.31/x
  3. Step 3: Cross multiply
    280,344.27x = 420,580.80 × 80,666.31
  4. Step 4: Simplify right side
    280,344.27x = 33,926,701,192.85
  5. Step 5: Solve for x
    x = 33,926,701,192.85/280,344.27
  6. Step 6: Final answer
    x = 121,017.99

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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.