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Finding the Fourth Proportional to 1,851.58, 2,777.10 and 553.15

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Solution

The fourth proportional to 1,851.58, 2,777.10 and 553.15 is: 829.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.58 : 2,777.10 = 553.15 : x
  2. Step 2: Convert to fraction form
    1,851.58/2,777.10 = 553.15/x
  3. Step 3: Cross multiply
    1,851.58x = 2,777.10 × 553.15
  4. Step 4: Simplify right side
    1,851.58x = 1,536,152.87
  5. Step 5: Solve for x
    x = 1,536,152.87/1,851.58
  6. Step 6: Final answer
    x = 829.64

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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.