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Finding the Fourth Proportional to 1,197.58, 1,787.63 and 1,051.78

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Solution

The fourth proportional to 1,197.58, 1,787.63 and 1,051.78 is: 1,569.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.58 : 1,787.63 = 1,051.78 : x
  2. Step 2: Convert to fraction form
    1,197.58/1,787.63 = 1,051.78/x
  3. Step 3: Cross multiply
    1,197.58x = 1,787.63 × 1,051.78
  4. Step 4: Simplify right side
    1,197.58x = 1,880,193.48
  5. Step 5: Solve for x
    x = 1,880,193.48/1,197.58
  6. Step 6: Final answer
    x = 1,569.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.