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Finding the Fourth Proportional to 317,745.76, 438,487.45 and 172,550.27

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Solution

The fourth proportional to 317,745.76, 438,487.45 and 172,550.27 is: 238,118.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,745.76 : 438,487.45 = 172,550.27 : x
  2. Step 2: Convert to fraction form
    317,745.76/438,487.45 = 172,550.27/x
  3. Step 3: Cross multiply
    317,745.76x = 438,487.45 × 172,550.27
  4. Step 4: Simplify right side
    317,745.76x = 75,661,126,909.63
  5. Step 5: Solve for x
    x = 75,661,126,909.63/317,745.76
  6. Step 6: Final answer
    x = 238,118.45

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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.