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Finding the Fourth Proportional to 641,715.89, 885,574.49 and 355,229.83

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Solution

The fourth proportional to 641,715.89, 885,574.49 and 355,229.83 is: 490,220.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,715.89 : 885,574.49 = 355,229.83 : x
  2. Step 2: Convert to fraction form
    641,715.89/885,574.49 = 355,229.83/x
  3. Step 3: Cross multiply
    641,715.89x = 885,574.49 × 355,229.83
  4. Step 4: Simplify right side
    641,715.89x = 314,582,475,535.04
  5. Step 5: Solve for x
    x = 314,582,475,535.04/641,715.89
  6. Step 6: Final answer
    x = 490,220.80

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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.