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Finding the Fourth Proportional to 713.21, 1,070.04 and 302.69

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Solution

The fourth proportional to 713.21, 1,070.04 and 302.69 is: 454.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.21 : 1,070.04 = 302.69 : x
  2. Step 2: Convert to fraction form
    713.21/1,070.04 = 302.69/x
  3. Step 3: Cross multiply
    713.21x = 1,070.04 × 302.69
  4. Step 4: Simplify right side
    713.21x = 323,885.64
  5. Step 5: Solve for x
    x = 323,885.64/713.21
  6. Step 6: Final answer
    x = 454.13

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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.