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Finding the Fourth Proportional to 1,235.63, 1,705.14 and 738.38

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Solution

The fourth proportional to 1,235.63, 1,705.14 and 738.38 is: 1,018.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.63 : 1,705.14 = 738.38 : x
  2. Step 2: Convert to fraction form
    1,235.63/1,705.14 = 738.38/x
  3. Step 3: Cross multiply
    1,235.63x = 1,705.14 × 738.38
  4. Step 4: Simplify right side
    1,235.63x = 1,259,041.27
  5. Step 5: Solve for x
    x = 1,259,041.27/1,235.63
  6. Step 6: Final answer
    x = 1,018.95

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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.