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Finding the Fourth Proportional to 614.45, 848.75 and 455.26

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Solution

The fourth proportional to 614.45, 848.75 and 455.26 is: 628.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.45 : 848.75 = 455.26 : x
  2. Step 2: Convert to fraction form
    614.45/848.75 = 455.26/x
  3. Step 3: Cross multiply
    614.45x = 848.75 × 455.26
  4. Step 4: Simplify right side
    614.45x = 386,403.17
  5. Step 5: Solve for x
    x = 386,403.17/614.45
  6. Step 6: Final answer
    x = 628.86

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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.