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Finding the Fourth Proportional to 1,009.62, 1,391.04 and 904.32

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Solution

The fourth proportional to 1,009.62, 1,391.04 and 904.32 is: 1,245.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.62 : 1,391.04 = 904.32 : x
  2. Step 2: Convert to fraction form
    1,009.62/1,391.04 = 904.32/x
  3. Step 3: Cross multiply
    1,009.62x = 1,391.04 × 904.32
  4. Step 4: Simplify right side
    1,009.62x = 1,257,945.29
  5. Step 5: Solve for x
    x = 1,257,945.29/1,009.62
  6. Step 6: Final answer
    x = 1,245.96

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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.