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Finding the Fourth Proportional to 711.08, 981.12 and 579.88

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Solution

The fourth proportional to 711.08, 981.12 and 579.88 is: 800.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.08 : 981.12 = 579.88 : x
  2. Step 2: Convert to fraction form
    711.08/981.12 = 579.88/x
  3. Step 3: Cross multiply
    711.08x = 981.12 × 579.88
  4. Step 4: Simplify right side
    711.08x = 568,931.87
  5. Step 5: Solve for x
    x = 568,931.87/711.08
  6. Step 6: Final answer
    x = 800.10

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Double scale
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1.5x scale

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.