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Finding the Fourth Proportional to 720,625.34, 994,420.22 and 398,316.22

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Solution

The fourth proportional to 720,625.34, 994,420.22 and 398,316.22 is: 549,652.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,625.34 : 994,420.22 = 398,316.22 : x
  2. Step 2: Convert to fraction form
    720,625.34/994,420.22 = 398,316.22/x
  3. Step 3: Cross multiply
    720,625.34x = 994,420.22 × 398,316.22
  4. Step 4: Simplify right side
    720,625.34x = 396,093,698,644.34
  5. Step 5: Solve for x
    x = 396,093,698,644.34/720,625.34
  6. Step 6: Final answer
    x = 549,652.75

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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.