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Finding the Fourth Proportional to 265,728.36, 398,612.54 and 76,187.22

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Solution

The fourth proportional to 265,728.36, 398,612.54 and 76,187.22 is: 114,286.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,728.36 : 398,612.54 = 76,187.22 : x
  2. Step 2: Convert to fraction form
    265,728.36/398,612.54 = 76,187.22/x
  3. Step 3: Cross multiply
    265,728.36x = 398,612.54 × 76,187.22
  4. Step 4: Simplify right side
    265,728.36x = 30,369,182,393.60
  5. Step 5: Solve for x
    x = 30,369,182,393.60/265,728.36
  6. Step 6: Final answer
    x = 114,286.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.