Home / 2,384.85-3,289.34-1,390.07

Finding the Fourth Proportional to 2,384.85, 3,289.34 and 1,390.07

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Solution

The fourth proportional to 2,384.85, 3,289.34 and 1,390.07 is: 1,917.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,384.85 : 3,289.34 = 1,390.07 : x
  2. Step 2: Convert to fraction form
    2,384.85/3,289.34 = 1,390.07/x
  3. Step 3: Cross multiply
    2,384.85x = 3,289.34 × 1,390.07
  4. Step 4: Simplify right side
    2,384.85x = 4,572,424.55
  5. Step 5: Solve for x
    x = 4,572,424.55/2,384.85
  6. Step 6: Final answer
    x = 1,917.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.