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Finding the Fourth Proportional to 1,455.63, 2,009.44 and 857.93

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Solution

The fourth proportional to 1,455.63, 2,009.44 and 857.93 is: 1,184.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.63 : 2,009.44 = 857.93 : x
  2. Step 2: Convert to fraction form
    1,455.63/2,009.44 = 857.93/x
  3. Step 3: Cross multiply
    1,455.63x = 2,009.44 × 857.93
  4. Step 4: Simplify right side
    1,455.63x = 1,723,961.19
  5. Step 5: Solve for x
    x = 1,723,961.19/1,455.63
  6. Step 6: Final answer
    x = 1,184.34

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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.