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Finding the Fourth Proportional to 309,889.92, 427,630.10 and 173,911.16

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Solution

The fourth proportional to 309,889.92, 427,630.10 and 173,911.16 is: 239,987.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,889.92 : 427,630.10 = 173,911.16 : x
  2. Step 2: Convert to fraction form
    309,889.92/427,630.10 = 173,911.16/x
  3. Step 3: Cross multiply
    309,889.92x = 427,630.10 × 173,911.16
  4. Step 4: Simplify right side
    309,889.92x = 74,369,646,741.92
  5. Step 5: Solve for x
    x = 74,369,646,741.92/309,889.92
  6. Step 6: Final answer
    x = 239,987.30

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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.