Home / 1,378.49-2,064.35-890.06

Finding the Fourth Proportional to 1,378.49, 2,064.35 and 890.06

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Solution

The fourth proportional to 1,378.49, 2,064.35 and 890.06 is: 1,332.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.49 : 2,064.35 = 890.06 : x
  2. Step 2: Convert to fraction form
    1,378.49/2,064.35 = 890.06/x
  3. Step 3: Cross multiply
    1,378.49x = 2,064.35 × 890.06
  4. Step 4: Simplify right side
    1,378.49x = 1,837,387.26
  5. Step 5: Solve for x
    x = 1,837,387.26/1,378.49
  6. Step 6: Final answer
    x = 1,332.90

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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.