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Finding the Fourth Proportional to 614.93, 848.30 and 428.72

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Solution

The fourth proportional to 614.93, 848.30 and 428.72 is: 591.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.93 : 848.30 = 428.72 : x
  2. Step 2: Convert to fraction form
    614.93/848.30 = 428.72/x
  3. Step 3: Cross multiply
    614.93x = 848.30 × 428.72
  4. Step 4: Simplify right side
    614.93x = 363,676.79
  5. Step 5: Solve for x
    x = 363,676.79/614.93
  6. Step 6: Final answer
    x = 591.42

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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.