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Finding the Fourth Proportional to 710.20, 979.59 and 474.05

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Solution

The fourth proportional to 710.20, 979.59 and 474.05 is: 653.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.20 : 979.59 = 474.05 : x
  2. Step 2: Convert to fraction form
    710.20/979.59 = 474.05/x
  3. Step 3: Cross multiply
    710.20x = 979.59 × 474.05
  4. Step 4: Simplify right side
    710.20x = 464,378.87
  5. Step 5: Solve for x
    x = 464,378.87/710.20
  6. Step 6: Final answer
    x = 653.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.