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Finding the Fourth Proportional to 709.94, 1,065.05 and 298.83

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Solution

The fourth proportional to 709.94, 1,065.05 and 298.83 is: 448.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.94 : 1,065.05 = 298.83 : x
  2. Step 2: Convert to fraction form
    709.94/1,065.05 = 298.83/x
  3. Step 3: Cross multiply
    709.94x = 1,065.05 × 298.83
  4. Step 4: Simplify right side
    709.94x = 318,267.40
  5. Step 5: Solve for x
    x = 318,267.40/709.94
  6. Step 6: Final answer
    x = 448.30

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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.