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Finding the Fourth Proportional to 642,418.62, 886,507.83 and 352,028.46

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Solution

The fourth proportional to 642,418.62, 886,507.83 and 352,028.46 is: 485,782.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,418.62 : 886,507.83 = 352,028.46 : x
  2. Step 2: Convert to fraction form
    642,418.62/886,507.83 = 352,028.46/x
  3. Step 3: Cross multiply
    642,418.62x = 886,507.83 × 352,028.46
  4. Step 4: Simplify right side
    642,418.62x = 312,075,986,172.84
  5. Step 5: Solve for x
    x = 312,075,986,172.84/642,418.62
  6. Step 6: Final answer
    x = 485,782.91

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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.