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Finding the Fourth Proportional to 485.36, 670.04 and 354.32

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Solution

The fourth proportional to 485.36, 670.04 and 354.32 is: 489.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.36 : 670.04 = 354.32 : x
  2. Step 2: Convert to fraction form
    485.36/670.04 = 354.32/x
  3. Step 3: Cross multiply
    485.36x = 670.04 × 354.32
  4. Step 4: Simplify right side
    485.36x = 237,408.57
  5. Step 5: Solve for x
    x = 237,408.57/485.36
  6. Step 6: Final answer
    x = 489.14

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1.5x scale

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.