Home / 3,085.60-4,258.12-1,688.35

Finding the Fourth Proportional to 3,085.60, 4,258.12 and 1,688.35

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Solution

The fourth proportional to 3,085.60, 4,258.12 and 1,688.35 is: 2,329.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,085.60 : 4,258.12 = 1,688.35 : x
  2. Step 2: Convert to fraction form
    3,085.60/4,258.12 = 1,688.35/x
  3. Step 3: Cross multiply
    3,085.60x = 4,258.12 × 1,688.35
  4. Step 4: Simplify right side
    3,085.60x = 7,189,182.04
  5. Step 5: Solve for x
    x = 7,189,182.04/3,085.60
  6. Step 6: Final answer
    x = 2,329.92

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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.