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Finding the Fourth Proportional to 706.47, 1,059.28 and 316.40

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Solution

The fourth proportional to 706.47, 1,059.28 and 316.40 is: 474.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.47 : 1,059.28 = 316.40 : x
  2. Step 2: Convert to fraction form
    706.47/1,059.28 = 316.40/x
  3. Step 3: Cross multiply
    706.47x = 1,059.28 × 316.40
  4. Step 4: Simplify right side
    706.47x = 335,153.48
  5. Step 5: Solve for x
    x = 335,153.48/706.47
  6. Step 6: Final answer
    x = 474.41

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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.