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Finding the Fourth Proportional to 955.03, 1,430.37 and 515.51

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Solution

The fourth proportional to 955.03, 1,430.37 and 515.51 is: 772.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.03 : 1,430.37 = 515.51 : x
  2. Step 2: Convert to fraction form
    955.03/1,430.37 = 515.51/x
  3. Step 3: Cross multiply
    955.03x = 1,430.37 × 515.51
  4. Step 4: Simplify right side
    955.03x = 737,370.04
  5. Step 5: Solve for x
    x = 737,370.04/955.03
  6. Step 6: Final answer
    x = 772.10

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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.