Home / 642,200.46-886,265.81-355,720.51

Finding the Fourth Proportional to 642,200.46, 886,265.81 and 355,720.51

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Solution

The fourth proportional to 642,200.46, 886,265.81 and 355,720.51 is: 490,910.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,200.46 : 886,265.81 = 355,720.51 : x
  2. Step 2: Convert to fraction form
    642,200.46/886,265.81 = 355,720.51/x
  3. Step 3: Cross multiply
    642,200.46x = 886,265.81 × 355,720.51
  4. Step 4: Simplify right side
    642,200.46x = 315,262,925,928.76
  5. Step 5: Solve for x
    x = 315,262,925,928.76/642,200.46
  6. Step 6: Final answer
    x = 490,910.46

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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.