Home / 420,318.90-630,663.33-220,591.13

Finding the Fourth Proportional to 420,318.90, 630,663.33 and 220,591.13

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Solution

The fourth proportional to 420,318.90, 630,663.33 and 220,591.13 is: 330,983.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,318.90 : 630,663.33 = 220,591.13 : x
  2. Step 2: Convert to fraction form
    420,318.90/630,663.33 = 220,591.13/x
  3. Step 3: Cross multiply
    420,318.90x = 630,663.33 × 220,591.13
  4. Step 4: Simplify right side
    420,318.90x = 139,118,733,460.95
  5. Step 5: Solve for x
    x = 139,118,733,460.95/420,318.90
  6. Step 6: Final answer
    x = 330,983.77

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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.