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Finding the Fourth Proportional to 709.50, 1,062.90 and 554.70

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Solution

The fourth proportional to 709.50, 1,062.90 and 554.70 is: 830.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.50 : 1,062.90 = 554.70 : x
  2. Step 2: Convert to fraction form
    709.50/1,062.90 = 554.70/x
  3. Step 3: Cross multiply
    709.50x = 1,062.90 × 554.70
  4. Step 4: Simplify right side
    709.50x = 589,590.63
  5. Step 5: Solve for x
    x = 589,590.63/709.50
  6. Step 6: Final answer
    x = 830.99

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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.