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Finding the Fourth Proportional to 490,689.40, 736,034.10 and 331,257.10

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Solution

The fourth proportional to 490,689.40, 736,034.10 and 331,257.10 is: 496,885.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,689.40 : 736,034.10 = 331,257.10 : x
  2. Step 2: Convert to fraction form
    490,689.40/736,034.10 = 331,257.10/x
  3. Step 3: Cross multiply
    490,689.40x = 736,034.10 × 331,257.10
  4. Step 4: Simplify right side
    490,689.40x = 243,816,521,467.11
  5. Step 5: Solve for x
    x = 243,816,521,467.11/490,689.40
  6. Step 6: Final answer
    x = 496,885.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.