Home / 402,445.60-555,371.68-218,682.56

Finding the Fourth Proportional to 402,445.60, 555,371.68 and 218,682.56

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Solution

The fourth proportional to 402,445.60, 555,371.68 and 218,682.56 is: 301,780.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,445.60 : 555,371.68 = 218,682.56 : x
  2. Step 2: Convert to fraction form
    402,445.60/555,371.68 = 218,682.56/x
  3. Step 3: Cross multiply
    402,445.60x = 555,371.68 × 218,682.56
  4. Step 4: Simplify right side
    402,445.60x = 121,450,100,733.90
  5. Step 5: Solve for x
    x = 121,450,100,733.90/402,445.60
  6. Step 6: Final answer
    x = 301,780.17

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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.