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Finding the Fourth Proportional to 477.18, 715.73 and 315.86

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Solution

The fourth proportional to 477.18, 715.73 and 315.86 is: 473.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.18 : 715.73 = 315.86 : x
  2. Step 2: Convert to fraction form
    477.18/715.73 = 315.86/x
  3. Step 3: Cross multiply
    477.18x = 715.73 × 315.86
  4. Step 4: Simplify right side
    477.18x = 226,065.32
  5. Step 5: Solve for x
    x = 226,065.32/477.18
  6. Step 6: Final answer
    x = 473.75

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