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Finding the Fourth Proportional to 287.50, 396.84 and 210.10

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Solution

The fourth proportional to 287.50, 396.84 and 210.10 is: 290.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.50 : 396.84 = 210.10 : x
  2. Step 2: Convert to fraction form
    287.50/396.84 = 210.10/x
  3. Step 3: Cross multiply
    287.50x = 396.84 × 210.10
  4. Step 4: Simplify right side
    287.50x = 83,376.08
  5. Step 5: Solve for x
    x = 83,376.08/287.50
  6. Step 6: Final answer
    x = 290.00

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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.