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Finding the Fourth Proportional to 670.77, 999.18 and 633.51

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Solution

The fourth proportional to 670.77, 999.18 and 633.51 is: 943.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.77 : 999.18 = 633.51 : x
  2. Step 2: Convert to fraction form
    670.77/999.18 = 633.51/x
  3. Step 3: Cross multiply
    670.77x = 999.18 × 633.51
  4. Step 4: Simplify right side
    670.77x = 632,990.52
  5. Step 5: Solve for x
    x = 632,990.52/670.77
  6. Step 6: Final answer
    x = 943.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.