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Finding the Fourth Proportional to 1,051.63, 1,574.67 and 869.83

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Solution

The fourth proportional to 1,051.63, 1,574.67 and 869.83 is: 1,302.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.63 : 1,574.67 = 869.83 : x
  2. Step 2: Convert to fraction form
    1,051.63/1,574.67 = 869.83/x
  3. Step 3: Cross multiply
    1,051.63x = 1,574.67 × 869.83
  4. Step 4: Simplify right side
    1,051.63x = 1,369,695.21
  5. Step 5: Solve for x
    x = 1,369,695.21/1,051.63
  6. Step 6: Final answer
    x = 1,302.45

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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.