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Finding the Fourth Proportional to 1,277.19, 1,762.60 and 745.88

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Solution

The fourth proportional to 1,277.19, 1,762.60 and 745.88 is: 1,029.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.19 : 1,762.60 = 745.88 : x
  2. Step 2: Convert to fraction form
    1,277.19/1,762.60 = 745.88/x
  3. Step 3: Cross multiply
    1,277.19x = 1,762.60 × 745.88
  4. Step 4: Simplify right side
    1,277.19x = 1,314,690.63
  5. Step 5: Solve for x
    x = 1,314,690.63/1,277.19
  6. Step 6: Final answer
    x = 1,029.36

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1.5x scale

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.