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Finding the Fourth Proportional to 508.47, 702.08 and 331.51

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Solution

The fourth proportional to 508.47, 702.08 and 331.51 is: 457.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.47 : 702.08 = 331.51 : x
  2. Step 2: Convert to fraction form
    508.47/702.08 = 331.51/x
  3. Step 3: Cross multiply
    508.47x = 702.08 × 331.51
  4. Step 4: Simplify right side
    508.47x = 232,746.54
  5. Step 5: Solve for x
    x = 232,746.54/508.47
  6. Step 6: Final answer
    x = 457.74

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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.