Home / 919,309.56-1,378,970.19-320,281.89

Finding the Fourth Proportional to 919,309.56, 1,378,970.19 and 320,281.89

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Solution

The fourth proportional to 919,309.56, 1,378,970.19 and 320,281.89 is: 480,424.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,309.56 : 1,378,970.19 = 320,281.89 : x
  2. Step 2: Convert to fraction form
    919,309.56/1,378,970.19 = 320,281.89/x
  3. Step 3: Cross multiply
    919,309.56x = 1,378,970.19 × 320,281.89
  4. Step 4: Simplify right side
    919,309.56x = 441,659,178,706.86
  5. Step 5: Solve for x
    x = 441,659,178,706.86/919,309.56
  6. Step 6: Final answer
    x = 480,424.87

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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.