Home / 641,865.46-885,802.01-355,385.55

Finding the Fourth Proportional to 641,865.46, 885,802.01 and 355,385.55

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Solution

The fourth proportional to 641,865.46, 885,802.01 and 355,385.55 is: 490,447.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,865.46 : 885,802.01 = 355,385.55 : x
  2. Step 2: Convert to fraction form
    641,865.46/885,802.01 = 355,385.55/x
  3. Step 3: Cross multiply
    641,865.46x = 885,802.01 × 355,385.55
  4. Step 4: Simplify right side
    641,865.46x = 314,801,230,085.95
  5. Step 5: Solve for x
    x = 314,801,230,085.95/641,865.46
  6. Step 6: Final answer
    x = 490,447.38

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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.