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Finding the Fourth Proportional to 555.21, 766.51 and 368.96

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Solution

The fourth proportional to 555.21, 766.51 and 368.96 is: 509.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.21 : 766.51 = 368.96 : x
  2. Step 2: Convert to fraction form
    555.21/766.51 = 368.96/x
  3. Step 3: Cross multiply
    555.21x = 766.51 × 368.96
  4. Step 4: Simplify right side
    555.21x = 282,809.65
  5. Step 5: Solve for x
    x = 282,809.65/555.21
  6. Step 6: Final answer
    x = 509.37

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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.