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Finding the Fourth Proportional to 420,569.29, 630,791.64 and 136,284.67

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Solution

The fourth proportional to 420,569.29, 630,791.64 and 136,284.67 is: 204,406.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,569.29 : 630,791.64 = 136,284.67 : x
  2. Step 2: Convert to fraction form
    420,569.29/630,791.64 = 136,284.67/x
  3. Step 3: Cross multiply
    420,569.29x = 630,791.64 × 136,284.67
  4. Step 4: Simplify right side
    420,569.29x = 85,967,230,496.16
  5. Step 5: Solve for x
    x = 85,967,230,496.16/420,569.29
  6. Step 6: Final answer
    x = 204,406.82

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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.