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Finding the Fourth Proportional to 738.74, 1,019.44 and 407.16

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Solution

The fourth proportional to 738.74, 1,019.44 and 407.16 is: 561.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.74 : 1,019.44 = 407.16 : x
  2. Step 2: Convert to fraction form
    738.74/1,019.44 = 407.16/x
  3. Step 3: Cross multiply
    738.74x = 1,019.44 × 407.16
  4. Step 4: Simplify right side
    738.74x = 415,073.84
  5. Step 5: Solve for x
    x = 415,073.84/738.74
  6. Step 6: Final answer
    x = 561.87

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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.