Home / 1,389.07-2,074.35-1,308.07

Finding the Fourth Proportional to 1,389.07, 2,074.35 and 1,308.07

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Solution

The fourth proportional to 1,389.07, 2,074.35 and 1,308.07 is: 1,953.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.07 : 2,074.35 = 1,308.07 : x
  2. Step 2: Convert to fraction form
    1,389.07/2,074.35 = 1,308.07/x
  3. Step 3: Cross multiply
    1,389.07x = 2,074.35 × 1,308.07
  4. Step 4: Simplify right side
    1,389.07x = 2,713,395.00
  5. Step 5: Solve for x
    x = 2,713,395.00/1,389.07
  6. Step 6: Final answer
    x = 1,953.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.