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Finding the Fourth Proportional to 262,802.40, 394,261.20 and 85,279.20

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Solution

The fourth proportional to 262,802.40, 394,261.20 and 85,279.20 is: 127,937.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,802.40 : 394,261.20 = 85,279.20 : x
  2. Step 2: Convert to fraction form
    262,802.40/394,261.20 = 85,279.20/x
  3. Step 3: Cross multiply
    262,802.40x = 394,261.20 × 85,279.20
  4. Step 4: Simplify right side
    262,802.40x = 33,622,279,727.04
  5. Step 5: Solve for x
    x = 33,622,279,727.04/262,802.40
  6. Step 6: Final answer
    x = 127,937.49

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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.