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Finding the Fourth Proportional to 930.51, 1,395.76 and 314.17

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Solution

The fourth proportional to 930.51, 1,395.76 and 314.17 is: 471.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.51 : 1,395.76 = 314.17 : x
  2. Step 2: Convert to fraction form
    930.51/1,395.76 = 314.17/x
  3. Step 3: Cross multiply
    930.51x = 1,395.76 × 314.17
  4. Step 4: Simplify right side
    930.51x = 438,501.64
  5. Step 5: Solve for x
    x = 438,501.64/930.51
  6. Step 6: Final answer
    x = 471.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.