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Finding the Fourth Proportional to 1,126.77, 1,555.03 and 654.81

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Solution

The fourth proportional to 1,126.77, 1,555.03 and 654.81 is: 903.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.77 : 1,555.03 = 654.81 : x
  2. Step 2: Convert to fraction form
    1,126.77/1,555.03 = 654.81/x
  3. Step 3: Cross multiply
    1,126.77x = 1,555.03 × 654.81
  4. Step 4: Simplify right side
    1,126.77x = 1,018,249.19
  5. Step 5: Solve for x
    x = 1,018,249.19/1,126.77
  6. Step 6: Final answer
    x = 903.69

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Double scale
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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.