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Finding the Fourth Proportional to 608.24, 840.06 and 485.24

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Solution

The fourth proportional to 608.24, 840.06 and 485.24 is: 670.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.24 : 840.06 = 485.24 : x
  2. Step 2: Convert to fraction form
    608.24/840.06 = 485.24/x
  3. Step 3: Cross multiply
    608.24x = 840.06 × 485.24
  4. Step 4: Simplify right side
    608.24x = 407,630.71
  5. Step 5: Solve for x
    x = 407,630.71/608.24
  6. Step 6: Final answer
    x = 670.18

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Double scale
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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.