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Finding the Fourth Proportional to 313.93, 432.03 and 258.45

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Solution

The fourth proportional to 313.93, 432.03 and 258.45 is: 355.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.93 : 432.03 = 258.45 : x
  2. Step 2: Convert to fraction form
    313.93/432.03 = 258.45/x
  3. Step 3: Cross multiply
    313.93x = 432.03 × 258.45
  4. Step 4: Simplify right side
    313.93x = 111,658.15
  5. Step 5: Solve for x
    x = 111,658.15/313.93
  6. Step 6: Final answer
    x = 355.68

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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.