Home / 1,386.25-2,077.56-1,239.13

Finding the Fourth Proportional to 1,386.25, 2,077.56 and 1,239.13

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Solution

The fourth proportional to 1,386.25, 2,077.56 and 1,239.13 is: 1,857.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.25 : 2,077.56 = 1,239.13 : x
  2. Step 2: Convert to fraction form
    1,386.25/2,077.56 = 1,239.13/x
  3. Step 3: Cross multiply
    1,386.25x = 2,077.56 × 1,239.13
  4. Step 4: Simplify right side
    1,386.25x = 2,574,370.02
  5. Step 5: Solve for x
    x = 2,574,370.02/1,386.25
  6. Step 6: Final answer
    x = 1,857.08

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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.