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Finding the Fourth Proportional to 707.55, 1,059.48 and 543.57

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Solution

The fourth proportional to 707.55, 1,059.48 and 543.57 is: 813.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.55 : 1,059.48 = 543.57 : x
  2. Step 2: Convert to fraction form
    707.55/1,059.48 = 543.57/x
  3. Step 3: Cross multiply
    707.55x = 1,059.48 × 543.57
  4. Step 4: Simplify right side
    707.55x = 575,901.54
  5. Step 5: Solve for x
    x = 575,901.54/707.55
  6. Step 6: Final answer
    x = 813.94

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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.