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Finding the Fourth Proportional to 917.06, 1,266.18 and 622.58

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Solution

The fourth proportional to 917.06, 1,266.18 and 622.58 is: 859.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.06 : 1,266.18 = 622.58 : x
  2. Step 2: Convert to fraction form
    917.06/1,266.18 = 622.58/x
  3. Step 3: Cross multiply
    917.06x = 1,266.18 × 622.58
  4. Step 4: Simplify right side
    917.06x = 788,298.34
  5. Step 5: Solve for x
    x = 788,298.34/917.06
  6. Step 6: Final answer
    x = 859.59

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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.