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Finding the Fourth Proportional to 420,349.91, 580,065.30 and 239,036.67

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Solution

The fourth proportional to 420,349.91, 580,065.30 and 239,036.67 is: 329,860.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,349.91 : 580,065.30 = 239,036.67 : x
  2. Step 2: Convert to fraction form
    420,349.91/580,065.30 = 239,036.67/x
  3. Step 3: Cross multiply
    420,349.91x = 580,065.30 × 239,036.67
  4. Step 4: Simplify right side
    420,349.91x = 138,656,877,694.55
  5. Step 5: Solve for x
    x = 138,656,877,694.55/420,349.91
  6. Step 6: Final answer
    x = 329,860.61

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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.