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Finding the Fourth Proportional to 420,304.89, 630,234.54 and 183,370.77

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Solution

The fourth proportional to 420,304.89, 630,234.54 and 183,370.77 is: 274,958.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,304.89 : 630,234.54 = 183,370.77 : x
  2. Step 2: Convert to fraction form
    420,304.89/630,234.54 = 183,370.77/x
  3. Step 3: Cross multiply
    420,304.89x = 630,234.54 × 183,370.77
  4. Step 4: Simplify right side
    420,304.89x = 115,566,592,880.40
  5. Step 5: Solve for x
    x = 115,566,592,880.40/420,304.89
  6. Step 6: Final answer
    x = 274,958.95

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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.