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Finding the Fourth Proportional to 720,242.52, 993,930.60 and 397,952.68

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Solution

The fourth proportional to 720,242.52, 993,930.60 and 397,952.68 is: 549,172.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,242.52 : 993,930.60 = 397,952.68 : x
  2. Step 2: Convert to fraction form
    720,242.52/993,930.60 = 397,952.68/x
  3. Step 3: Cross multiply
    720,242.52x = 993,930.60 × 397,952.68
  4. Step 4: Simplify right side
    720,242.52x = 395,537,346,004.01
  5. Step 5: Solve for x
    x = 395,537,346,004.01/720,242.52
  6. Step 6: Final answer
    x = 549,172.45

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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.