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Finding the Fourth Proportional to 719.15, 992.36 and 457.07

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Solution

The fourth proportional to 719.15, 992.36 and 457.07 is: 630.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.15 : 992.36 = 457.07 : x
  2. Step 2: Convert to fraction form
    719.15/992.36 = 457.07/x
  3. Step 3: Cross multiply
    719.15x = 992.36 × 457.07
  4. Step 4: Simplify right side
    719.15x = 453,574.17
  5. Step 5: Solve for x
    x = 453,574.17/719.15
  6. Step 6: Final answer
    x = 630.71

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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.