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Finding the Fourth Proportional to 491.04, 727.37 and 485.58

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Solution

The fourth proportional to 491.04, 727.37 and 485.58 is: 719.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.04 : 727.37 = 485.58 : x
  2. Step 2: Convert to fraction form
    491.04/727.37 = 485.58/x
  3. Step 3: Cross multiply
    491.04x = 727.37 × 485.58
  4. Step 4: Simplify right side
    491.04x = 353,196.32
  5. Step 5: Solve for x
    x = 353,196.32/491.04
  6. Step 6: Final answer
    x = 719.28

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.