Home / 1,258.40-1,730.76-1,161.20

Finding the Fourth Proportional to 1,258.40, 1,730.76 and 1,161.20

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Solution

The fourth proportional to 1,258.40, 1,730.76 and 1,161.20 is: 1,597.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.40 : 1,730.76 = 1,161.20 : x
  2. Step 2: Convert to fraction form
    1,258.40/1,730.76 = 1,161.20/x
  3. Step 3: Cross multiply
    1,258.40x = 1,730.76 × 1,161.20
  4. Step 4: Simplify right side
    1,258.40x = 2,009,758.51
  5. Step 5: Solve for x
    x = 2,009,758.51/1,258.40
  6. Step 6: Final answer
    x = 1,597.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.