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Finding the Fourth Proportional to 1,027.61, 1,418.70 and 654.90

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Solution

The fourth proportional to 1,027.61, 1,418.70 and 654.90 is: 904.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.61 : 1,418.70 = 654.90 : x
  2. Step 2: Convert to fraction form
    1,027.61/1,418.70 = 654.90/x
  3. Step 3: Cross multiply
    1,027.61x = 1,418.70 × 654.90
  4. Step 4: Simplify right side
    1,027.61x = 929,106.63
  5. Step 5: Solve for x
    x = 929,106.63/1,027.61
  6. Step 6: Final answer
    x = 904.14

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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.