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Finding the Fourth Proportional to 842.66, 1,264.47 and 477.86

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Solution

The fourth proportional to 842.66, 1,264.47 and 477.86 is: 717.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.66 : 1,264.47 = 477.86 : x
  2. Step 2: Convert to fraction form
    842.66/1,264.47 = 477.86/x
  3. Step 3: Cross multiply
    842.66x = 1,264.47 × 477.86
  4. Step 4: Simplify right side
    842.66x = 604,239.63
  5. Step 5: Solve for x
    x = 604,239.63/842.66
  6. Step 6: Final answer
    x = 717.06

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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.