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Finding the Fourth Proportional to 515.88, 707.04 and 508.68

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Solution

The fourth proportional to 515.88, 707.04 and 508.68 is: 697.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.88 : 707.04 = 508.68 : x
  2. Step 2: Convert to fraction form
    515.88/707.04 = 508.68/x
  3. Step 3: Cross multiply
    515.88x = 707.04 × 508.68
  4. Step 4: Simplify right side
    515.88x = 359,657.11
  5. Step 5: Solve for x
    x = 359,657.11/515.88
  6. Step 6: Final answer
    x = 697.17

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.