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Finding the Fourth Proportional to 2,379.60, 3,569.40 and 2,124.45

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Solution

The fourth proportional to 2,379.60, 3,569.40 and 2,124.45 is: 3,186.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.60 : 3,569.40 = 2,124.45 : x
  2. Step 2: Convert to fraction form
    2,379.60/3,569.40 = 2,124.45/x
  3. Step 3: Cross multiply
    2,379.60x = 3,569.40 × 2,124.45
  4. Step 4: Simplify right side
    2,379.60x = 7,583,011.83
  5. Step 5: Solve for x
    x = 7,583,011.83/2,379.60
  6. Step 6: Final answer
    x = 3,186.68

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1.5x scale

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.