Home / 1,439.32-2,156.58-1,385.32

Finding the Fourth Proportional to 1,439.32, 2,156.58 and 1,385.32

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Solution

The fourth proportional to 1,439.32, 2,156.58 and 1,385.32 is: 2,075.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.32 : 2,156.58 = 1,385.32 : x
  2. Step 2: Convert to fraction form
    1,439.32/2,156.58 = 1,385.32/x
  3. Step 3: Cross multiply
    1,439.32x = 2,156.58 × 1,385.32
  4. Step 4: Simplify right side
    1,439.32x = 2,987,553.41
  5. Step 5: Solve for x
    x = 2,987,553.41/1,439.32
  6. Step 6: Final answer
    x = 2,075.67

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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.