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Finding the Fourth Proportional to 720,235.27, 993,897.97 and 397,938.43

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Solution

The fourth proportional to 720,235.27, 993,897.97 and 397,938.43 is: 549,140.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,235.27 : 993,897.97 = 397,938.43 : x
  2. Step 2: Convert to fraction form
    720,235.27/993,897.97 = 397,938.43/x
  3. Step 3: Cross multiply
    720,235.27x = 993,897.97 × 397,938.43
  4. Step 4: Simplify right side
    720,235.27x = 395,510,197,761.99
  5. Step 5: Solve for x
    x = 395,510,197,761.99/720,235.27
  6. Step 6: Final answer
    x = 549,140.28

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1.5x scale

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.