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Finding the Fourth Proportional to 210.36, 315.57 and 56.30

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Solution

The fourth proportional to 210.36, 315.57 and 56.30 is: 84.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.36 : 315.57 = 56.30 : x
  2. Step 2: Convert to fraction form
    210.36/315.57 = 56.30/x
  3. Step 3: Cross multiply
    210.36x = 315.57 × 56.30
  4. Step 4: Simplify right side
    210.36x = 17,765.07
  5. Step 5: Solve for x
    x = 17,765.07/210.36
  6. Step 6: Final answer
    x = 84.45

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.