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Finding the Fourth Proportional to 1,486.04, 2,050.80 and 856.40

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Solution

The fourth proportional to 1,486.04, 2,050.80 and 856.40 is: 1,181.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.04 : 2,050.80 = 856.40 : x
  2. Step 2: Convert to fraction form
    1,486.04/2,050.80 = 856.40/x
  3. Step 3: Cross multiply
    1,486.04x = 2,050.80 × 856.40
  4. Step 4: Simplify right side
    1,486.04x = 1,756,305.12
  5. Step 5: Solve for x
    x = 1,756,305.12/1,486.04
  6. Step 6: Final answer
    x = 1,181.87

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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.