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Finding the Fourth Proportional to 309,242.61, 426,680.87 and 180,102.69

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Solution

The fourth proportional to 309,242.61, 426,680.87 and 180,102.69 is: 248,498.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,242.61 : 426,680.87 = 180,102.69 : x
  2. Step 2: Convert to fraction form
    309,242.61/426,680.87 = 180,102.69/x
  3. Step 3: Cross multiply
    309,242.61x = 426,680.87 × 180,102.69
  4. Step 4: Simplify right side
    309,242.61x = 76,846,371,558.03
  5. Step 5: Solve for x
    x = 76,846,371,558.03/309,242.61
  6. Step 6: Final answer
    x = 248,498.65

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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.