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Finding the Fourth Proportional to 720,504.77, 994,236.75 and 398,214.79

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Solution

The fourth proportional to 720,504.77, 994,236.75 and 398,214.79 is: 549,503.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,504.77 : 994,236.75 = 398,214.79 : x
  2. Step 2: Convert to fraction form
    720,504.77/994,236.75 = 398,214.79/x
  3. Step 3: Cross multiply
    720,504.77x = 994,236.75 × 398,214.79
  4. Step 4: Simplify right side
    720,504.77x = 395,919,776,125.94
  5. Step 5: Solve for x
    x = 395,919,776,125.94/720,504.77
  6. Step 6: Final answer
    x = 549,503.34

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Similar ratio
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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.