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Finding the Fourth Proportional to 1,690.60, 2,536.29 and 536.35

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Solution

The fourth proportional to 1,690.60, 2,536.29 and 536.35 is: 804.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.60 : 2,536.29 = 536.35 : x
  2. Step 2: Convert to fraction form
    1,690.60/2,536.29 = 536.35/x
  3. Step 3: Cross multiply
    1,690.60x = 2,536.29 × 536.35
  4. Step 4: Simplify right side
    1,690.60x = 1,360,334.81
  5. Step 5: Solve for x
    x = 1,360,334.81/1,690.60
  6. Step 6: Final answer
    x = 804.65

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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.