Home / 1,440.32-1,986.95-1,384.43

Finding the Fourth Proportional to 1,440.32, 1,986.95 and 1,384.43

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Solution

The fourth proportional to 1,440.32, 1,986.95 and 1,384.43 is: 1,909.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.32 : 1,986.95 = 1,384.43 : x
  2. Step 2: Convert to fraction form
    1,440.32/1,986.95 = 1,384.43/x
  3. Step 3: Cross multiply
    1,440.32x = 1,986.95 × 1,384.43
  4. Step 4: Simplify right side
    1,440.32x = 2,750,801.62
  5. Step 5: Solve for x
    x = 2,750,801.62/1,440.32
  6. Step 6: Final answer
    x = 1,909.85

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Double scale
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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.