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Finding the Fourth Proportional to 642,768.20, 887,028.94 and 352,407.10

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Solution

The fourth proportional to 642,768.20, 887,028.94 and 352,407.10 is: 486,326.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,768.20 : 887,028.94 = 352,407.10 : x
  2. Step 2: Convert to fraction form
    642,768.20/887,028.94 = 352,407.10/x
  3. Step 3: Cross multiply
    642,768.20x = 887,028.94 × 352,407.10
  4. Step 4: Simplify right side
    642,768.20x = 312,595,296,361.47
  5. Step 5: Solve for x
    x = 312,595,296,361.47/642,768.20
  6. Step 6: Final answer
    x = 486,326.64

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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.