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Finding the Fourth Proportional to 842.45, 1,162.58 and 469.43

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Solution

The fourth proportional to 842.45, 1,162.58 and 469.43 is: 647.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.45 : 1,162.58 = 469.43 : x
  2. Step 2: Convert to fraction form
    842.45/1,162.58 = 469.43/x
  3. Step 3: Cross multiply
    842.45x = 1,162.58 × 469.43
  4. Step 4: Simplify right side
    842.45x = 545,741.77
  5. Step 5: Solve for x
    x = 545,741.77/842.45
  6. Step 6: Final answer
    x = 647.81

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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.