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Finding the Fourth Proportional to 1,852.12, 2,778.50 and 619.65

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Solution

The fourth proportional to 1,852.12, 2,778.50 and 619.65 is: 929.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,852.12 : 2,778.50 = 619.65 : x
  2. Step 2: Convert to fraction form
    1,852.12/2,778.50 = 619.65/x
  3. Step 3: Cross multiply
    1,852.12x = 2,778.50 × 619.65
  4. Step 4: Simplify right side
    1,852.12x = 1,721,699.07
  5. Step 5: Solve for x
    x = 1,721,699.07/1,852.12
  6. Step 6: Final answer
    x = 929.59

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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.