Home / 1,370.10-2,055.09-445.70

Finding the Fourth Proportional to 1,370.10, 2,055.09 and 445.70

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Solution

The fourth proportional to 1,370.10, 2,055.09 and 445.70 is: 668.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.10 : 2,055.09 = 445.70 : x
  2. Step 2: Convert to fraction form
    1,370.10/2,055.09 = 445.70/x
  3. Step 3: Cross multiply
    1,370.10x = 2,055.09 × 445.70
  4. Step 4: Simplify right side
    1,370.10x = 915,943.34
  5. Step 5: Solve for x
    x = 915,943.34/1,370.10
  6. Step 6: Final answer
    x = 668.52

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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.