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Finding the Fourth Proportional to 670.18, 922.93 and 628.51

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Solution

The fourth proportional to 670.18, 922.93 and 628.51 is: 865.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.18 : 922.93 = 628.51 : x
  2. Step 2: Convert to fraction form
    670.18/922.93 = 628.51/x
  3. Step 3: Cross multiply
    670.18x = 922.93 × 628.51
  4. Step 4: Simplify right side
    670.18x = 580,070.73
  5. Step 5: Solve for x
    x = 580,070.73/670.18
  6. Step 6: Final answer
    x = 865.54

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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.