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Finding the Fourth Proportional to 555.65, 766.83 and 511

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Solution

The fourth proportional to 555.65, 766.83 and 511 is: 705.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.65 : 766.83 = 511 : x
  2. Step 2: Convert to fraction form
    555.65/766.83 = 511/x
  3. Step 3: Cross multiply
    555.65x = 766.83 × 511
  4. Step 4: Simplify right side
    555.65x = 391,850.13
  5. Step 5: Solve for x
    x = 391,850.13/555.65
  6. Step 6: Final answer
    x = 705.21

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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.