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Finding the Fourth Proportional to 309,615.68, 427,274.32 and 173,679.76

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Solution

The fourth proportional to 309,615.68, 427,274.32 and 173,679.76 is: 239,680.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,615.68 : 427,274.32 = 173,679.76 : x
  2. Step 2: Convert to fraction form
    309,615.68/427,274.32 = 173,679.76/x
  3. Step 3: Cross multiply
    309,615.68x = 427,274.32 × 173,679.76
  4. Step 4: Simplify right side
    309,615.68x = 74,208,901,351.76
  5. Step 5: Solve for x
    x = 74,208,901,351.76/309,615.68
  6. Step 6: Final answer
    x = 239,680.69

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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.