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Finding the Fourth Proportional to 848.31, 1,272.96 and 458.32

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Solution

The fourth proportional to 848.31, 1,272.96 and 458.32 is: 687.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.31 : 1,272.96 = 458.32 : x
  2. Step 2: Convert to fraction form
    848.31/1,272.96 = 458.32/x
  3. Step 3: Cross multiply
    848.31x = 1,272.96 × 458.32
  4. Step 4: Simplify right side
    848.31x = 583,420.74
  5. Step 5: Solve for x
    x = 583,420.74/848.31
  6. Step 6: Final answer
    x = 687.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.