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Finding the Fourth Proportional to 703.33, 1,055.03 and 520.18

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Solution

The fourth proportional to 703.33, 1,055.03 and 520.18 is: 780.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.33 : 1,055.03 = 520.18 : x
  2. Step 2: Convert to fraction form
    703.33/1,055.03 = 520.18/x
  3. Step 3: Cross multiply
    703.33x = 1,055.03 × 520.18
  4. Step 4: Simplify right side
    703.33x = 548,805.51
  5. Step 5: Solve for x
    x = 548,805.51/703.33
  6. Step 6: Final answer
    x = 780.30

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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.