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Finding the Fourth Proportional to 339.24, 510.09 and 312.51

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Solution

The fourth proportional to 339.24, 510.09 and 312.51 is: 469.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.24 : 510.09 = 312.51 : x
  2. Step 2: Convert to fraction form
    339.24/510.09 = 312.51/x
  3. Step 3: Cross multiply
    339.24x = 510.09 × 312.51
  4. Step 4: Simplify right side
    339.24x = 159,408.23
  5. Step 5: Solve for x
    x = 159,408.23/339.24
  6. Step 6: Final answer
    x = 469.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.