Home / 2,856.60-3,943.98-1,913.76

Finding the Fourth Proportional to 2,856.60, 3,943.98 and 1,913.76

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Solution

The fourth proportional to 2,856.60, 3,943.98 and 1,913.76 is: 2,642.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.60 : 3,943.98 = 1,913.76 : x
  2. Step 2: Convert to fraction form
    2,856.60/3,943.98 = 1,913.76/x
  3. Step 3: Cross multiply
    2,856.60x = 3,943.98 × 1,913.76
  4. Step 4: Simplify right side
    2,856.60x = 7,547,831.16
  5. Step 5: Solve for x
    x = 7,547,831.16/2,856.60
  6. Step 6: Final answer
    x = 2,642.24

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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.