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Finding the Fourth Proportional to 555.69, 767.79 and 511.95

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Solution

The fourth proportional to 555.69, 767.79 and 511.95 is: 707.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.69 : 767.79 = 511.95 : x
  2. Step 2: Convert to fraction form
    555.69/767.79 = 511.95/x
  3. Step 3: Cross multiply
    555.69x = 767.79 × 511.95
  4. Step 4: Simplify right side
    555.69x = 393,070.09
  5. Step 5: Solve for x
    x = 393,070.09/555.69
  6. Step 6: Final answer
    x = 707.35

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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.