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Finding the Fourth Proportional to 391,477.91, 540,230.61 and 228,124.20

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Solution

The fourth proportional to 391,477.91, 540,230.61 and 228,124.20 is: 314,806.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,477.91 : 540,230.61 = 228,124.20 : x
  2. Step 2: Convert to fraction form
    391,477.91/540,230.61 = 228,124.20/x
  3. Step 3: Cross multiply
    391,477.91x = 540,230.61 × 228,124.20
  4. Step 4: Simplify right side
    391,477.91x = 123,239,675,564.30
  5. Step 5: Solve for x
    x = 123,239,675,564.30/391,477.91
  6. Step 6: Final answer
    x = 314,806.21

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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.