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Finding the Fourth Proportional to 485.35, 728.36 and 348.51

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Solution

The fourth proportional to 485.35, 728.36 and 348.51 is: 523.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.35 : 728.36 = 348.51 : x
  2. Step 2: Convert to fraction form
    485.35/728.36 = 348.51/x
  3. Step 3: Cross multiply
    485.35x = 728.36 × 348.51
  4. Step 4: Simplify right side
    485.35x = 253,841.61
  5. Step 5: Solve for x
    x = 253,841.61/485.35
  6. Step 6: Final answer
    x = 523.01

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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.