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Finding the Fourth Proportional to 720,516.11, 994,363.70 and 398,219.27

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Solution

The fourth proportional to 720,516.11, 994,363.70 and 398,219.27 is: 549,571.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,516.11 : 994,363.70 = 398,219.27 : x
  2. Step 2: Convert to fraction form
    720,516.11/994,363.70 = 398,219.27/x
  3. Step 3: Cross multiply
    720,516.11x = 994,363.70 × 398,219.27
  4. Step 4: Simplify right side
    720,516.11x = 395,974,779,765.58
  5. Step 5: Solve for x
    x = 395,974,779,765.58/720,516.11
  6. Step 6: Final answer
    x = 549,571.03

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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.