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Finding the Fourth Proportional to 1,485.63, 2,227.77 and 869.49

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Solution

The fourth proportional to 1,485.63, 2,227.77 and 869.49 is: 1,303.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.63 : 2,227.77 = 869.49 : x
  2. Step 2: Convert to fraction form
    1,485.63/2,227.77 = 869.49/x
  3. Step 3: Cross multiply
    1,485.63x = 2,227.77 × 869.49
  4. Step 4: Simplify right side
    1,485.63x = 1,937,023.74
  5. Step 5: Solve for x
    x = 1,937,023.74/1,485.63
  6. Step 6: Final answer
    x = 1,303.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.