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Finding the Fourth Proportional to 673.32, 928.93 and 515.79

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Solution

The fourth proportional to 673.32, 928.93 and 515.79 is: 711.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.32 : 928.93 = 515.79 : x
  2. Step 2: Convert to fraction form
    673.32/928.93 = 515.79/x
  3. Step 3: Cross multiply
    673.32x = 928.93 × 515.79
  4. Step 4: Simplify right side
    673.32x = 479,130.23
  5. Step 5: Solve for x
    x = 479,130.23/673.32
  6. Step 6: Final answer
    x = 711.59

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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.