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Finding the Fourth Proportional to 557.48, 840.38 and 549.08

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Solution

The fourth proportional to 557.48, 840.38 and 549.08 is: 827.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.48 : 840.38 = 549.08 : x
  2. Step 2: Convert to fraction form
    557.48/840.38 = 549.08/x
  3. Step 3: Cross multiply
    557.48x = 840.38 × 549.08
  4. Step 4: Simplify right side
    557.48x = 461,435.85
  5. Step 5: Solve for x
    x = 461,435.85/557.48
  6. Step 6: Final answer
    x = 827.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.