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Finding the Fourth Proportional to 368.56, 555.49 and 317.81

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Solution

The fourth proportional to 368.56, 555.49 and 317.81 is: 479.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.56 : 555.49 = 317.81 : x
  2. Step 2: Convert to fraction form
    368.56/555.49 = 317.81/x
  3. Step 3: Cross multiply
    368.56x = 555.49 × 317.81
  4. Step 4: Simplify right side
    368.56x = 176,538.69
  5. Step 5: Solve for x
    x = 176,538.69/368.56
  6. Step 6: Final answer
    x = 479.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.