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Finding the Fourth Proportional to 555.21, 766.50 and 368.95

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Solution

The fourth proportional to 555.21, 766.50 and 368.95 is: 509.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.21 : 766.50 = 368.95 : x
  2. Step 2: Convert to fraction form
    555.21/766.50 = 368.95/x
  3. Step 3: Cross multiply
    555.21x = 766.50 × 368.95
  4. Step 4: Simplify right side
    555.21x = 282,800.18
  5. Step 5: Solve for x
    x = 282,800.18/555.21
  6. Step 6: Final answer
    x = 509.36

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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.