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Finding the Fourth Proportional to 2,590.74, 3,886.62 and 835.98

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Solution

The fourth proportional to 2,590.74, 3,886.62 and 835.98 is: 1,254.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,590.74 : 3,886.62 = 835.98 : x
  2. Step 2: Convert to fraction form
    2,590.74/3,886.62 = 835.98/x
  3. Step 3: Cross multiply
    2,590.74x = 3,886.62 × 835.98
  4. Step 4: Simplify right side
    2,590.74x = 3,249,136.59
  5. Step 5: Solve for x
    x = 3,249,136.59/2,590.74
  6. Step 6: Final answer
    x = 1,254.13

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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.