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Finding the Fourth Proportional to 711.02, 981.46 and 579.80

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Solution

The fourth proportional to 711.02, 981.46 and 579.80 is: 800.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.02 : 981.46 = 579.80 : x
  2. Step 2: Convert to fraction form
    711.02/981.46 = 579.80/x
  3. Step 3: Cross multiply
    711.02x = 981.46 × 579.80
  4. Step 4: Simplify right side
    711.02x = 569,050.51
  5. Step 5: Solve for x
    x = 569,050.51/711.02
  6. Step 6: Final answer
    x = 800.33

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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.