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Finding the Fourth Proportional to 420,633.70, 630,950.43 and 125,145.70

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Solution

The fourth proportional to 420,633.70, 630,950.43 and 125,145.70 is: 187,718.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,633.70 : 630,950.43 = 125,145.70 : x
  2. Step 2: Convert to fraction form
    420,633.70/630,950.43 = 125,145.70/x
  3. Step 3: Cross multiply
    420,633.70x = 630,950.43 × 125,145.70
  4. Step 4: Simplify right side
    420,633.70x = 78,960,733,227.65
  5. Step 5: Solve for x
    x = 78,960,733,227.65/420,633.70
  6. Step 6: Final answer
    x = 187,718.51

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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.