Home / 320,864.75-442,910-186,728.75

Finding the Fourth Proportional to 320,864.75, 442,910 and 186,728.75

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Solution

The fourth proportional to 320,864.75, 442,910 and 186,728.75 is: 257,753.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,864.75 : 442,910 = 186,728.75 : x
  2. Step 2: Convert to fraction form
    320,864.75/442,910 = 186,728.75/x
  3. Step 3: Cross multiply
    320,864.75x = 442,910 × 186,728.75
  4. Step 4: Simplify right side
    320,864.75x = 82,704,030,662.50
  5. Step 5: Solve for x
    x = 82,704,030,662.50/320,864.75
  6. Step 6: Final answer
    x = 257,753.56

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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.