Home / 420,126.45-630,469.88-217,908.93

Finding the Fourth Proportional to 420,126.45, 630,469.88 and 217,908.93

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Solution

The fourth proportional to 420,126.45, 630,469.88 and 217,908.93 is: 327,008.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,126.45 : 630,469.88 = 217,908.93 : x
  2. Step 2: Convert to fraction form
    420,126.45/630,469.88 = 217,908.93/x
  3. Step 3: Cross multiply
    420,126.45x = 630,469.88 × 217,908.93
  4. Step 4: Simplify right side
    420,126.45x = 137,385,019,039.90
  5. Step 5: Solve for x
    x = 137,385,019,039.90/420,126.45
  6. Step 6: Final answer
    x = 327,008.74

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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.