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Finding the Fourth Proportional to 457.05, 631.38 and 368.40

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Solution

The fourth proportional to 457.05, 631.38 and 368.40 is: 508.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.05 : 631.38 = 368.40 : x
  2. Step 2: Convert to fraction form
    457.05/631.38 = 368.40/x
  3. Step 3: Cross multiply
    457.05x = 631.38 × 368.40
  4. Step 4: Simplify right side
    457.05x = 232,600.39
  5. Step 5: Solve for x
    x = 232,600.39/457.05
  6. Step 6: Final answer
    x = 508.92

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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.