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Finding the Fourth Proportional to 718.22, 990.51 and 607.58

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Solution

The fourth proportional to 718.22, 990.51 and 607.58 is: 837.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.22 : 990.51 = 607.58 : x
  2. Step 2: Convert to fraction form
    718.22/990.51 = 607.58/x
  3. Step 3: Cross multiply
    718.22x = 990.51 × 607.58
  4. Step 4: Simplify right side
    718.22x = 601,814.07
  5. Step 5: Solve for x
    x = 601,814.07/718.22
  6. Step 6: Final answer
    x = 837.92

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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.