Home / 1,390.08-2,076.26-1,258.10

Finding the Fourth Proportional to 1,390.08, 2,076.26 and 1,258.10

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Solution

The fourth proportional to 1,390.08, 2,076.26 and 1,258.10 is: 1,879.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.08 : 2,076.26 = 1,258.10 : x
  2. Step 2: Convert to fraction form
    1,390.08/2,076.26 = 1,258.10/x
  3. Step 3: Cross multiply
    1,390.08x = 2,076.26 × 1,258.10
  4. Step 4: Simplify right side
    1,390.08x = 2,612,142.71
  5. Step 5: Solve for x
    x = 2,612,142.71/1,390.08
  6. Step 6: Final answer
    x = 1,879.13

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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.