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Finding the Fourth Proportional to 518.37, 715.32 and 282.32

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Solution

The fourth proportional to 518.37, 715.32 and 282.32 is: 389.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.37 : 715.32 = 282.32 : x
  2. Step 2: Convert to fraction form
    518.37/715.32 = 282.32/x
  3. Step 3: Cross multiply
    518.37x = 715.32 × 282.32
  4. Step 4: Simplify right side
    518.37x = 201,945.57
  5. Step 5: Solve for x
    x = 201,945.57/518.37
  6. Step 6: Final answer
    x = 389.58

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1.5x scale

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.