Home / 420,141.28-630,492.18-217,923.76

Finding the Fourth Proportional to 420,141.28, 630,492.18 and 217,923.76

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Solution

The fourth proportional to 420,141.28, 630,492.18 and 217,923.76 is: 327,031.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,141.28 : 630,492.18 = 217,923.76 : x
  2. Step 2: Convert to fraction form
    420,141.28/630,492.18 = 217,923.76/x
  3. Step 3: Cross multiply
    420,141.28x = 630,492.18 × 217,923.76
  4. Step 4: Simplify right side
    420,141.28x = 137,399,226,516.20
  5. Step 5: Solve for x
    x = 137,399,226,516.20/420,141.28
  6. Step 6: Final answer
    x = 327,031.01

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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.