Home / 1,396.95-1,927.90-900.62

Finding the Fourth Proportional to 1,396.95, 1,927.90 and 900.62

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Solution

The fourth proportional to 1,396.95, 1,927.90 and 900.62 is: 1,242.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.95 : 1,927.90 = 900.62 : x
  2. Step 2: Convert to fraction form
    1,396.95/1,927.90 = 900.62/x
  3. Step 3: Cross multiply
    1,396.95x = 1,927.90 × 900.62
  4. Step 4: Simplify right side
    1,396.95x = 1,736,304.01
  5. Step 5: Solve for x
    x = 1,736,304.01/1,396.95
  6. Step 6: Final answer
    x = 1,242.93

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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.