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Finding the Fourth Proportional to 420,128.94, 630,028.98 and 183,310.86

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Solution

The fourth proportional to 420,128.94, 630,028.98 and 183,310.86 is: 274,894.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,128.94 : 630,028.98 = 183,310.86 : x
  2. Step 2: Convert to fraction form
    420,128.94/630,028.98 = 183,310.86/x
  3. Step 3: Cross multiply
    420,128.94x = 630,028.98 × 183,310.86
  4. Step 4: Simplify right side
    420,128.94x = 115,491,154,148.72
  5. Step 5: Solve for x
    x = 115,491,154,148.72/420,128.94
  6. Step 6: Final answer
    x = 274,894.55

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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.