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Finding the Fourth Proportional to 675.18, 930.58 and 515.60

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Solution

The fourth proportional to 675.18, 930.58 and 515.60 is: 710.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.18 : 930.58 = 515.60 : x
  2. Step 2: Convert to fraction form
    675.18/930.58 = 515.60/x
  3. Step 3: Cross multiply
    675.18x = 930.58 × 515.60
  4. Step 4: Simplify right side
    675.18x = 479,807.05
  5. Step 5: Solve for x
    x = 479,807.05/675.18
  6. Step 6: Final answer
    x = 710.64

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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.