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Finding the Fourth Proportional to 706.34, 1,059.30 and 432.15

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Solution

The fourth proportional to 706.34, 1,059.30 and 432.15 is: 648.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.34 : 1,059.30 = 432.15 : x
  2. Step 2: Convert to fraction form
    706.34/1,059.30 = 432.15/x
  3. Step 3: Cross multiply
    706.34x = 1,059.30 × 432.15
  4. Step 4: Simplify right side
    706.34x = 457,776.50
  5. Step 5: Solve for x
    x = 457,776.50/706.34
  6. Step 6: Final answer
    x = 648.10

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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.