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Finding the Fourth Proportional to 515.89, 711.93 and 283.01

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Solution

The fourth proportional to 515.89, 711.93 and 283.01 is: 390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.89 : 711.93 = 283.01 : x
  2. Step 2: Convert to fraction form
    515.89/711.93 = 283.01/x
  3. Step 3: Cross multiply
    515.89x = 711.93 × 283.01
  4. Step 4: Simplify right side
    515.89x = 201,483.31
  5. Step 5: Solve for x
    x = 201,483.31/515.89
  6. Step 6: Final answer
    x = 390.55

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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.