Home / 1,386.77-2,088.35-1,206.34

Finding the Fourth Proportional to 1,386.77, 2,088.35 and 1,206.34

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Solution

The fourth proportional to 1,386.77, 2,088.35 and 1,206.34 is: 1,816.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.77 : 2,088.35 = 1,206.34 : x
  2. Step 2: Convert to fraction form
    1,386.77/2,088.35 = 1,206.34/x
  3. Step 3: Cross multiply
    1,386.77x = 2,088.35 × 1,206.34
  4. Step 4: Simplify right side
    1,386.77x = 2,519,248.89
  5. Step 5: Solve for x
    x = 2,519,248.89/1,386.77
  6. Step 6: Final answer
    x = 1,816.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.