Home / 355,755.03-490,863.21-217,963.05

Finding the Fourth Proportional to 355,755.03, 490,863.21 and 217,963.05

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Solution

The fourth proportional to 355,755.03, 490,863.21 and 217,963.05 is: 300,740.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,755.03 : 490,863.21 = 217,963.05 : x
  2. Step 2: Convert to fraction form
    355,755.03/490,863.21 = 217,963.05/x
  3. Step 3: Cross multiply
    355,755.03x = 490,863.21 × 217,963.05
  4. Step 4: Simplify right side
    355,755.03x = 106,990,038,840.26
  5. Step 5: Solve for x
    x = 106,990,038,840.26/355,755.03
  6. Step 6: Final answer
    x = 300,740.76

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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.