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Finding the Fourth Proportional to 315,489.32, 435,384.78 and 179,542.77

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Solution

The fourth proportional to 315,489.32, 435,384.78 and 179,542.77 is: 247,774.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,489.32 : 435,384.78 = 179,542.77 : x
  2. Step 2: Convert to fraction form
    315,489.32/435,384.78 = 179,542.77/x
  3. Step 3: Cross multiply
    315,489.32x = 435,384.78 × 179,542.77
  4. Step 4: Simplify right side
    315,489.32x = 78,170,189,417.04
  5. Step 5: Solve for x
    x = 78,170,189,417.04/315,489.32
  6. Step 6: Final answer
    x = 247,774.44

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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.