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Finding the Fourth Proportional to 583.40, 818.20 and 583.40

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Solution

The fourth proportional to 583.40, 818.20 and 583.40 is: 818.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.40 : 818.20 = 583.40 : x
  2. Step 2: Convert to fraction form
    583.40/818.20 = 583.40/x
  3. Step 3: Cross multiply
    583.40x = 818.20 × 583.40
  4. Step 4: Simplify right side
    583.40x = 477,337.88
  5. Step 5: Solve for x
    x = 477,337.88/583.40
  6. Step 6: Final answer
    x = 818.20

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.