Home / 642,203.13-886,240.38-355,741.77

Finding the Fourth Proportional to 642,203.13, 886,240.38 and 355,741.77

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Solution

The fourth proportional to 642,203.13, 886,240.38 and 355,741.77 is: 490,923.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,203.13 : 886,240.38 = 355,741.77 : x
  2. Step 2: Convert to fraction form
    642,203.13/886,240.38 = 355,741.77/x
  3. Step 3: Cross multiply
    642,203.13x = 886,240.38 × 355,741.77
  4. Step 4: Simplify right side
    642,203.13x = 315,272,721,426.67
  5. Step 5: Solve for x
    x = 315,272,721,426.67/642,203.13
  6. Step 6: Final answer
    x = 490,923.68

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Double scale
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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.