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Finding the Fourth Proportional to 720,350.84, 994,144.02 and 398,123.84

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Solution

The fourth proportional to 720,350.84, 994,144.02 and 398,123.84 is: 549,443.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,350.84 : 994,144.02 = 398,123.84 : x
  2. Step 2: Convert to fraction form
    720,350.84/994,144.02 = 398,123.84/x
  3. Step 3: Cross multiply
    720,350.84x = 994,144.02 × 398,123.84
  4. Step 4: Simplify right side
    720,350.84x = 395,792,434,755.44
  5. Step 5: Solve for x
    x = 395,792,434,755.44/720,350.84
  6. Step 6: Final answer
    x = 549,443.98

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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.