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Finding the Fourth Proportional to 914.30, 1,370.55 and 543.68

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Solution

The fourth proportional to 914.30, 1,370.55 and 543.68 is: 814.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.30 : 1,370.55 = 543.68 : x
  2. Step 2: Convert to fraction form
    914.30/1,370.55 = 543.68/x
  3. Step 3: Cross multiply
    914.30x = 1,370.55 × 543.68
  4. Step 4: Simplify right side
    914.30x = 745,140.62
  5. Step 5: Solve for x
    x = 745,140.62/914.30
  6. Step 6: Final answer
    x = 814.98

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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.