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Finding the Fourth Proportional to 515.56, 707.57 and 501.16

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Solution

The fourth proportional to 515.56, 707.57 and 501.16 is: 687.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.56 : 707.57 = 501.16 : x
  2. Step 2: Convert to fraction form
    515.56/707.57 = 501.16/x
  3. Step 3: Cross multiply
    515.56x = 707.57 × 501.16
  4. Step 4: Simplify right side
    515.56x = 354,605.78
  5. Step 5: Solve for x
    x = 354,605.78/515.56
  6. Step 6: Final answer
    x = 687.81

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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.