Home / 420,188.50-630,288.22-139,705.75

Finding the Fourth Proportional to 420,188.50, 630,288.22 and 139,705.75

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Solution

The fourth proportional to 420,188.50, 630,288.22 and 139,705.75 is: 209,560.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,188.50 : 630,288.22 = 139,705.75 : x
  2. Step 2: Convert to fraction form
    420,188.50/630,288.22 = 139,705.75/x
  3. Step 3: Cross multiply
    420,188.50x = 630,288.22 × 139,705.75
  4. Step 4: Simplify right side
    420,188.50x = 88,054,888,491.27
  5. Step 5: Solve for x
    x = 88,054,888,491.27/420,188.50
  6. Step 6: Final answer
    x = 209,560.44

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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.