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Finding the Fourth Proportional to 309,842.54, 427,601.56 and 173,885.18

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Solution

The fourth proportional to 309,842.54, 427,601.56 and 173,885.18 is: 239,972.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,842.54 : 427,601.56 = 173,885.18 : x
  2. Step 2: Convert to fraction form
    309,842.54/427,601.56 = 173,885.18/x
  3. Step 3: Cross multiply
    309,842.54x = 427,601.56 × 173,885.18
  4. Step 4: Simplify right side
    309,842.54x = 74,353,573,898.40
  5. Step 5: Solve for x
    x = 74,353,573,898.40/309,842.54
  6. Step 6: Final answer
    x = 239,972.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.