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Finding the Fourth Proportional to 641,639.86, 885,660.42 and 369,889.52

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Solution

The fourth proportional to 641,639.86, 885,660.42 and 369,889.52 is: 510,561.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,639.86 : 885,660.42 = 369,889.52 : x
  2. Step 2: Convert to fraction form
    641,639.86/885,660.42 = 369,889.52/x
  3. Step 3: Cross multiply
    641,639.86x = 885,660.42 × 369,889.52
  4. Step 4: Simplify right side
    641,639.86x = 327,596,507,636.80
  5. Step 5: Solve for x
    x = 327,596,507,636.80/641,639.86
  6. Step 6: Final answer
    x = 510,561.34

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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.