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Finding the Fourth Proportional to 583.21, 805.15 and 425.68

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Solution

The fourth proportional to 583.21, 805.15 and 425.68 is: 587.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.21 : 805.15 = 425.68 : x
  2. Step 2: Convert to fraction form
    583.21/805.15 = 425.68/x
  3. Step 3: Cross multiply
    583.21x = 805.15 × 425.68
  4. Step 4: Simplify right side
    583.21x = 342,737.79
  5. Step 5: Solve for x
    x = 342,737.79/583.21
  6. Step 6: Final answer
    x = 587.67

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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.