Home / 641,919.63-885,838.25-355,433.56

Finding the Fourth Proportional to 641,919.63, 885,838.25 and 355,433.56

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Solution

The fourth proportional to 641,919.63, 885,838.25 and 355,433.56 is: 490,492.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,919.63 : 885,838.25 = 355,433.56 : x
  2. Step 2: Convert to fraction form
    641,919.63/885,838.25 = 355,433.56/x
  3. Step 3: Cross multiply
    641,919.63x = 885,838.25 × 355,433.56
  4. Step 4: Simplify right side
    641,919.63x = 314,856,642,781.67
  5. Step 5: Solve for x
    x = 314,856,642,781.67/641,919.63
  6. Step 6: Final answer
    x = 490,492.31

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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.