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Finding the Fourth Proportional to 515.93, 712.73 and 477.05

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Solution

The fourth proportional to 515.93, 712.73 and 477.05 is: 659.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.93 : 712.73 = 477.05 : x
  2. Step 2: Convert to fraction form
    515.93/712.73 = 477.05/x
  3. Step 3: Cross multiply
    515.93x = 712.73 × 477.05
  4. Step 4: Simplify right side
    515.93x = 340,005.48
  5. Step 5: Solve for x
    x = 340,005.48/515.93
  6. Step 6: Final answer
    x = 659.02

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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.