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Finding the Fourth Proportional to 1,035.02, 1,427.88 and 661.34

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Solution

The fourth proportional to 1,035.02, 1,427.88 and 661.34 is: 912.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.02 : 1,427.88 = 661.34 : x
  2. Step 2: Convert to fraction form
    1,035.02/1,427.88 = 661.34/x
  3. Step 3: Cross multiply
    1,035.02x = 1,427.88 × 661.34
  4. Step 4: Simplify right side
    1,035.02x = 944,314.16
  5. Step 5: Solve for x
    x = 944,314.16/1,035.02
  6. Step 6: Final answer
    x = 912.36

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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.