Home / 641,375.46-885,085.65-354,895.74

Finding the Fourth Proportional to 641,375.46, 885,085.65 and 354,895.74

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Solution

The fourth proportional to 641,375.46, 885,085.65 and 354,895.74 is: 489,749.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,375.46 : 885,085.65 = 354,895.74 : x
  2. Step 2: Convert to fraction form
    641,375.46/885,085.65 = 354,895.74/x
  3. Step 3: Cross multiply
    641,375.46x = 885,085.65 × 354,895.74
  4. Step 4: Simplify right side
    641,375.46x = 314,113,126,720.13
  5. Step 5: Solve for x
    x = 314,113,126,720.13/641,375.46
  6. Step 6: Final answer
    x = 489,749.21

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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.