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Finding the Fourth Proportional to 940.76, 1,411.13 and 446.86

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Solution

The fourth proportional to 940.76, 1,411.13 and 446.86 is: 670.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.76 : 1,411.13 = 446.86 : x
  2. Step 2: Convert to fraction form
    940.76/1,411.13 = 446.86/x
  3. Step 3: Cross multiply
    940.76x = 1,411.13 × 446.86
  4. Step 4: Simplify right side
    940.76x = 630,575.14
  5. Step 5: Solve for x
    x = 630,575.14/940.76
  6. Step 6: Final answer
    x = 670.29

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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.