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Finding the Fourth Proportional to 402,991.80, 556,208.18 and 231,025.24

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Solution

The fourth proportional to 402,991.80, 556,208.18 and 231,025.24 is: 318,860.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,991.80 : 556,208.18 = 231,025.24 : x
  2. Step 2: Convert to fraction form
    402,991.80/556,208.18 = 231,025.24/x
  3. Step 3: Cross multiply
    402,991.80x = 556,208.18 × 231,025.24
  4. Step 4: Simplify right side
    402,991.80x = 128,498,128,680.94
  5. Step 5: Solve for x
    x = 128,498,128,680.94/402,991.80
  6. Step 6: Final answer
    x = 318,860.41

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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.