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Finding the Fourth Proportional to 515.32, 710.68 and 328.60

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Solution

The fourth proportional to 515.32, 710.68 and 328.60 is: 453.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.32 : 710.68 = 328.60 : x
  2. Step 2: Convert to fraction form
    515.32/710.68 = 328.60/x
  3. Step 3: Cross multiply
    515.32x = 710.68 × 328.60
  4. Step 4: Simplify right side
    515.32x = 233,529.45
  5. Step 5: Solve for x
    x = 233,529.45/515.32
  6. Step 6: Final answer
    x = 453.17

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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.