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Finding the Fourth Proportional to 631.07, 870.83 and 365.39

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Solution

The fourth proportional to 631.07, 870.83 and 365.39 is: 504.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.07 : 870.83 = 365.39 : x
  2. Step 2: Convert to fraction form
    631.07/870.83 = 365.39/x
  3. Step 3: Cross multiply
    631.07x = 870.83 × 365.39
  4. Step 4: Simplify right side
    631.07x = 318,186.39
  5. Step 5: Solve for x
    x = 318,186.39/631.07
  6. Step 6: Final answer
    x = 504.21

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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.