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Finding the Fourth Proportional to 608.95, 840.38 and 360.21

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Solution

The fourth proportional to 608.95, 840.38 and 360.21 is: 497.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.95 : 840.38 = 360.21 : x
  2. Step 2: Convert to fraction form
    608.95/840.38 = 360.21/x
  3. Step 3: Cross multiply
    608.95x = 840.38 × 360.21
  4. Step 4: Simplify right side
    608.95x = 302,713.28
  5. Step 5: Solve for x
    x = 302,713.28/608.95
  6. Step 6: Final answer
    x = 497.11

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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.