Home / 919,315.26-1,378,972.89-288,279.90

Finding the Fourth Proportional to 919,315.26, 1,378,972.89 and 288,279.90

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Solution

The fourth proportional to 919,315.26, 1,378,972.89 and 288,279.90 is: 432,419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,315.26 : 1,378,972.89 = 288,279.90 : x
  2. Step 2: Convert to fraction form
    919,315.26/1,378,972.89 = 288,279.90/x
  3. Step 3: Cross multiply
    919,315.26x = 1,378,972.89 × 288,279.90
  4. Step 4: Simplify right side
    919,315.26x = 397,530,166,831.91
  5. Step 5: Solve for x
    x = 397,530,166,831.91/919,315.26
  6. Step 6: Final answer
    x = 432,419.85

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Similar ratio
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1.5x scale

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.