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Finding the Fourth Proportional to 1,133.24, 1,564.26 and 870.92

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Solution

The fourth proportional to 1,133.24, 1,564.26 and 870.92 is: 1,202.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,133.24 : 1,564.26 = 870.92 : x
  2. Step 2: Convert to fraction form
    1,133.24/1,564.26 = 870.92/x
  3. Step 3: Cross multiply
    1,133.24x = 1,564.26 × 870.92
  4. Step 4: Simplify right side
    1,133.24x = 1,362,345.32
  5. Step 5: Solve for x
    x = 1,362,345.32/1,133.24
  6. Step 6: Final answer
    x = 1,202.17

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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.