Home / 320,378.19-480,330-193,988.72

Finding the Fourth Proportional to 320,378.19, 480,330 and 193,988.72

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Solution

The fourth proportional to 320,378.19, 480,330 and 193,988.72 is: 290,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,378.19 : 480,330 = 193,988.72 : x
  2. Step 2: Convert to fraction form
    320,378.19/480,330 = 193,988.72/x
  3. Step 3: Cross multiply
    320,378.19x = 480,330 × 193,988.72
  4. Step 4: Simplify right side
    320,378.19x = 93,178,599,475.95
  5. Step 5: Solve for x
    x = 93,178,599,475.95/320,378.19
  6. Step 6: Final answer
    x = 290,839.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.