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Finding the Fourth Proportional to 1,235.19, 1,851.81 and 618.58

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Solution

The fourth proportional to 1,235.19, 1,851.81 and 618.58 is: 927.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.19 : 1,851.81 = 618.58 : x
  2. Step 2: Convert to fraction form
    1,235.19/1,851.81 = 618.58/x
  3. Step 3: Cross multiply
    1,235.19x = 1,851.81 × 618.58
  4. Step 4: Simplify right side
    1,235.19x = 1,145,492.63
  5. Step 5: Solve for x
    x = 1,145,492.63/1,235.19
  6. Step 6: Final answer
    x = 927.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.