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Finding the Fourth Proportional to 1,065.25, 1,597.26 and 415.63

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Solution

The fourth proportional to 1,065.25, 1,597.26 and 415.63 is: 623.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.25 : 1,597.26 = 415.63 : x
  2. Step 2: Convert to fraction form
    1,065.25/1,597.26 = 415.63/x
  3. Step 3: Cross multiply
    1,065.25x = 1,597.26 × 415.63
  4. Step 4: Simplify right side
    1,065.25x = 663,861.19
  5. Step 5: Solve for x
    x = 663,861.19/1,065.25
  6. Step 6: Final answer
    x = 623.20

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Why These Related Problems?

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