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Finding the Fourth Proportional to 607.08, 838.62 and 491.16

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Solution

The fourth proportional to 607.08, 838.62 and 491.16 is: 678.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.08 : 838.62 = 491.16 : x
  2. Step 2: Convert to fraction form
    607.08/838.62 = 491.16/x
  3. Step 3: Cross multiply
    607.08x = 838.62 × 491.16
  4. Step 4: Simplify right side
    607.08x = 411,896.60
  5. Step 5: Solve for x
    x = 411,896.60/607.08
  6. Step 6: Final answer
    x = 678.49

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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.