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Finding the Fourth Proportional to 309,500.96, 427,128.95 and 173,528.33

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Solution

The fourth proportional to 309,500.96, 427,128.95 and 173,528.33 is: 239,478.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,500.96 : 427,128.95 = 173,528.33 : x
  2. Step 2: Convert to fraction form
    309,500.96/427,128.95 = 173,528.33/x
  3. Step 3: Cross multiply
    309,500.96x = 427,128.95 × 173,528.33
  4. Step 4: Simplify right side
    309,500.96x = 74,118,970,384.87
  5. Step 5: Solve for x
    x = 74,118,970,384.87/309,500.96
  6. Step 6: Final answer
    x = 239,478.97

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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.