Home / 398,897.28-550,440-220,037.76

Finding the Fourth Proportional to 398,897.28, 550,440 and 220,037.76

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Solution

The fourth proportional to 398,897.28, 550,440 and 220,037.76 is: 303,631.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,897.28 : 550,440 = 220,037.76 : x
  2. Step 2: Convert to fraction form
    398,897.28/550,440 = 220,037.76/x
  3. Step 3: Cross multiply
    398,897.28x = 550,440 × 220,037.76
  4. Step 4: Simplify right side
    398,897.28x = 121,117,584,614.40
  5. Step 5: Solve for x
    x = 121,117,584,614.40/398,897.28
  6. Step 6: Final answer
    x = 303,631.01

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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.