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Finding the Fourth Proportional to 642,836.36, 887,107.20 and 370,901

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Solution

The fourth proportional to 642,836.36, 887,107.20 and 370,901 is: 511,839.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,836.36 : 887,107.20 = 370,901 : x
  2. Step 2: Convert to fraction form
    642,836.36/887,107.20 = 370,901/x
  3. Step 3: Cross multiply
    642,836.36x = 887,107.20 × 370,901
  4. Step 4: Simplify right side
    642,836.36x = 329,028,947,587.20
  5. Step 5: Solve for x
    x = 329,028,947,587.20/642,836.36
  6. Step 6: Final answer
    x = 511,839.35

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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.