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Finding the Fourth Proportional to 285.03, 390.75 and 272.34

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Solution

The fourth proportional to 285.03, 390.75 and 272.34 is: 373.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.03 : 390.75 = 272.34 : x
  2. Step 2: Convert to fraction form
    285.03/390.75 = 272.34/x
  3. Step 3: Cross multiply
    285.03x = 390.75 × 272.34
  4. Step 4: Simplify right side
    285.03x = 106,416.86
  5. Step 5: Solve for x
    x = 106,416.86/285.03
  6. Step 6: Final answer
    x = 373.35

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.