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Finding the Fourth Proportional to 631.02, 942.29 and 515.70

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Solution

The fourth proportional to 631.02, 942.29 and 515.70 is: 770.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.02 : 942.29 = 515.70 : x
  2. Step 2: Convert to fraction form
    631.02/942.29 = 515.70/x
  3. Step 3: Cross multiply
    631.02x = 942.29 × 515.70
  4. Step 4: Simplify right side
    631.02x = 485,936.37
  5. Step 5: Solve for x
    x = 485,936.37/631.02
  6. Step 6: Final answer
    x = 770.08

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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.