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Finding the Fourth Proportional to 641,862.20, 885,797.51 and 355,382.28

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Solution

The fourth proportional to 641,862.20, 885,797.51 and 355,382.28 is: 490,442.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,862.20 : 885,797.51 = 355,382.28 : x
  2. Step 2: Convert to fraction form
    641,862.20/885,797.51 = 355,382.28/x
  3. Step 3: Cross multiply
    641,862.20x = 885,797.51 × 355,382.28
  4. Step 4: Simplify right side
    641,862.20x = 314,796,738,722.12
  5. Step 5: Solve for x
    x = 314,796,738,722.12/641,862.20
  6. Step 6: Final answer
    x = 490,442.87

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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.