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Finding the Fourth Proportional to 703.40, 1,053.39 and 486.32

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Solution

The fourth proportional to 703.40, 1,053.39 and 486.32 is: 728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.40 : 1,053.39 = 486.32 : x
  2. Step 2: Convert to fraction form
    703.40/1,053.39 = 486.32/x
  3. Step 3: Cross multiply
    703.40x = 1,053.39 × 486.32
  4. Step 4: Simplify right side
    703.40x = 512,284.62
  5. Step 5: Solve for x
    x = 512,284.62/703.40
  6. Step 6: Final answer
    x = 728.30

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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.