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Finding the Fourth Proportional to 1,153.69, 1,590.44 and 760.03

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Solution

The fourth proportional to 1,153.69, 1,590.44 and 760.03 is: 1,047.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.69 : 1,590.44 = 760.03 : x
  2. Step 2: Convert to fraction form
    1,153.69/1,590.44 = 760.03/x
  3. Step 3: Cross multiply
    1,153.69x = 1,590.44 × 760.03
  4. Step 4: Simplify right side
    1,153.69x = 1,208,774.16
  5. Step 5: Solve for x
    x = 1,208,774.16/1,153.69
  6. Step 6: Final answer
    x = 1,047.75

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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.