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Finding the Fourth Proportional to 720,563.36, 994,429.04 and 398,266.58

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Solution

The fourth proportional to 720,563.36, 994,429.04 and 398,266.58 is: 549,636.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,563.36 : 994,429.04 = 398,266.58 : x
  2. Step 2: Convert to fraction form
    720,563.36/994,429.04 = 398,266.58/x
  3. Step 3: Cross multiply
    720,563.36x = 994,429.04 × 398,266.58
  4. Step 4: Simplify right side
    720,563.36x = 396,047,853,308.22
  5. Step 5: Solve for x
    x = 396,047,853,308.22/720,563.36
  6. Step 6: Final answer
    x = 549,636.41

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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.