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Finding the Fourth Proportional to 1,486.47, 2,051.55 and 856.88

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Solution

The fourth proportional to 1,486.47, 2,051.55 and 856.88 is: 1,182.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.47 : 2,051.55 = 856.88 : x
  2. Step 2: Convert to fraction form
    1,486.47/2,051.55 = 856.88/x
  3. Step 3: Cross multiply
    1,486.47x = 2,051.55 × 856.88
  4. Step 4: Simplify right side
    1,486.47x = 1,757,927.88
  5. Step 5: Solve for x
    x = 1,757,927.88/1,486.47
  6. Step 6: Final answer
    x = 1,182.62

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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.