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Finding the Fourth Proportional to 713.53, 1,069.78 and 302.35

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Solution

The fourth proportional to 713.53, 1,069.78 and 302.35 is: 453.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.53 : 1,069.78 = 302.35 : x
  2. Step 2: Convert to fraction form
    713.53/1,069.78 = 302.35/x
  3. Step 3: Cross multiply
    713.53x = 1,069.78 × 302.35
  4. Step 4: Simplify right side
    713.53x = 323,447.98
  5. Step 5: Solve for x
    x = 323,447.98/713.53
  6. Step 6: Final answer
    x = 453.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.