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Finding the Fourth Proportional to 1,127.12, 1,690.68 and 357.68

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Solution

The fourth proportional to 1,127.12, 1,690.68 and 357.68 is: 536.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.12 : 1,690.68 = 357.68 : x
  2. Step 2: Convert to fraction form
    1,127.12/1,690.68 = 357.68/x
  3. Step 3: Cross multiply
    1,127.12x = 1,690.68 × 357.68
  4. Step 4: Simplify right side
    1,127.12x = 604,722.42
  5. Step 5: Solve for x
    x = 604,722.42/1,127.12
  6. Step 6: Final answer
    x = 536.52

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Double scale
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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.