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Finding the Fourth Proportional to 1,852.81, 2,779.45 and 621.11

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Solution

The fourth proportional to 1,852.81, 2,779.45 and 621.11 is: 931.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,852.81 : 2,779.45 = 621.11 : x
  2. Step 2: Convert to fraction form
    1,852.81/2,779.45 = 621.11/x
  3. Step 3: Cross multiply
    1,852.81x = 2,779.45 × 621.11
  4. Step 4: Simplify right side
    1,852.81x = 1,726,344.19
  5. Step 5: Solve for x
    x = 1,726,344.19/1,852.81
  6. Step 6: Final answer
    x = 931.74

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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.