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Finding the Fourth Proportional to 314.93, 472.86 and 256.53

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Solution

The fourth proportional to 314.93, 472.86 and 256.53 is: 385.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.93 : 472.86 = 256.53 : x
  2. Step 2: Convert to fraction form
    314.93/472.86 = 256.53/x
  3. Step 3: Cross multiply
    314.93x = 472.86 × 256.53
  4. Step 4: Simplify right side
    314.93x = 121,303.28
  5. Step 5: Solve for x
    x = 121,303.28/314.93
  6. Step 6: Final answer
    x = 385.18

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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.