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Finding the Fourth Proportional to 309,031.66, 426,453.72 and 171,204.91

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Solution

The fourth proportional to 309,031.66, 426,453.72 and 171,204.91 is: 236,257.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,031.66 : 426,453.72 = 171,204.91 : x
  2. Step 2: Convert to fraction form
    309,031.66/426,453.72 = 171,204.91/x
  3. Step 3: Cross multiply
    309,031.66x = 426,453.72 × 171,204.91
  4. Step 4: Simplify right side
    309,031.66x = 73,010,970,751.77
  5. Step 5: Solve for x
    x = 73,010,970,751.77/309,031.66
  6. Step 6: Final answer
    x = 236,257.25

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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.