Home / 309,890.91-427,631.49-173,912.16

Finding the Fourth Proportional to 309,890.91, 427,631.49 and 173,912.16

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Solution

The fourth proportional to 309,890.91, 427,631.49 and 173,912.16 is: 239,988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,890.91 : 427,631.49 = 173,912.16 : x
  2. Step 2: Convert to fraction form
    309,890.91/427,631.49 = 173,912.16/x
  3. Step 3: Cross multiply
    309,890.91x = 427,631.49 × 173,912.16
  4. Step 4: Simplify right side
    309,890.91x = 74,370,316,109.92
  5. Step 5: Solve for x
    x = 74,370,316,109.92/309,890.91
  6. Step 6: Final answer
    x = 239,988.70

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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.