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Finding the Fourth Proportional to 421,126.13, 581,087.13 and 239,841.56

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Solution

The fourth proportional to 421,126.13, 581,087.13 and 239,841.56 is: 330,943.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,126.13 : 581,087.13 = 239,841.56 : x
  2. Step 2: Convert to fraction form
    421,126.13/581,087.13 = 239,841.56/x
  3. Step 3: Cross multiply
    421,126.13x = 581,087.13 × 239,841.56
  4. Step 4: Simplify right side
    421,126.13x = 139,368,843,755.12
  5. Step 5: Solve for x
    x = 139,368,843,755.12/421,126.13
  6. Step 6: Final answer
    x = 330,943.23

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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.