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Finding the Fourth Proportional to 1,153.13, 1,591.34 and 904.01

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Solution

The fourth proportional to 1,153.13, 1,591.34 and 904.01 is: 1,247.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.13 : 1,591.34 = 904.01 : x
  2. Step 2: Convert to fraction form
    1,153.13/1,591.34 = 904.01/x
  3. Step 3: Cross multiply
    1,153.13x = 1,591.34 × 904.01
  4. Step 4: Simplify right side
    1,153.13x = 1,438,574.80
  5. Step 5: Solve for x
    x = 1,438,574.80/1,153.13
  6. Step 6: Final answer
    x = 1,247.54

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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.