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Finding the Fourth Proportional to 391,509.81, 540,274.41 and 228,155.85

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Solution

The fourth proportional to 391,509.81, 540,274.41 and 228,155.85 is: 314,849.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,509.81 : 540,274.41 = 228,155.85 : x
  2. Step 2: Convert to fraction form
    391,509.81/540,274.41 = 228,155.85/x
  3. Step 3: Cross multiply
    391,509.81x = 540,274.41 × 228,155.85
  4. Step 4: Simplify right side
    391,509.81x = 123,266,767,246.80
  5. Step 5: Solve for x
    x = 123,266,767,246.80/391,509.81
  6. Step 6: Final answer
    x = 314,849.75

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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.