Home / 1,056.49-1,454.59-890.30

Finding the Fourth Proportional to 1,056.49, 1,454.59 and 890.30

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Solution

The fourth proportional to 1,056.49, 1,454.59 and 890.30 is: 1,225.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.49 : 1,454.59 = 890.30 : x
  2. Step 2: Convert to fraction form
    1,056.49/1,454.59 = 890.30/x
  3. Step 3: Cross multiply
    1,056.49x = 1,454.59 × 890.30
  4. Step 4: Simplify right side
    1,056.49x = 1,295,021.48
  5. Step 5: Solve for x
    x = 1,295,021.48/1,056.49
  6. Step 6: Final answer
    x = 1,225.78

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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.