Home / 642,496.25-886,664.27-355,989.53

Finding the Fourth Proportional to 642,496.25, 886,664.27 and 355,989.53

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Solution

The fourth proportional to 642,496.25, 886,664.27 and 355,989.53 is: 491,276.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,496.25 : 886,664.27 = 355,989.53 : x
  2. Step 2: Convert to fraction form
    642,496.25/886,664.27 = 355,989.53/x
  3. Step 3: Cross multiply
    642,496.25x = 886,664.27 × 355,989.53
  4. Step 4: Simplify right side
    642,496.25x = 315,643,194,965.15
  5. Step 5: Solve for x
    x = 315,643,194,965.15/642,496.25
  6. Step 6: Final answer
    x = 491,276.32

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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.