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Finding the Fourth Proportional to 641,401.94, 884,410.35 and 479,738.90

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Solution

The fourth proportional to 641,401.94, 884,410.35 and 479,738.90 is: 661,497.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,401.94 : 884,410.35 = 479,738.90 : x
  2. Step 2: Convert to fraction form
    641,401.94/884,410.35 = 479,738.90/x
  3. Step 3: Cross multiply
    641,401.94x = 884,410.35 × 479,738.90
  4. Step 4: Simplify right side
    641,401.94x = 424,286,048,869.62
  5. Step 5: Solve for x
    x = 424,286,048,869.62/641,401.94
  6. Step 6: Final answer
    x = 661,497.92

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Double scale
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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.