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Finding the Fourth Proportional to 420,569.66, 630,384.26 and 220,911.14

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Solution

The fourth proportional to 420,569.66, 630,384.26 and 220,911.14 is: 331,119.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,569.66 : 630,384.26 = 220,911.14 : x
  2. Step 2: Convert to fraction form
    420,569.66/630,384.26 = 220,911.14/x
  3. Step 3: Cross multiply
    420,569.66x = 630,384.26 × 220,911.14
  4. Step 4: Simplify right side
    420,569.66x = 139,258,901,258.18
  5. Step 5: Solve for x
    x = 139,258,901,258.18/420,569.66
  6. Step 6: Final answer
    x = 331,119.71

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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.