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Finding the Fourth Proportional to 720,520.60, 994,369.91 and 398,223.76

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Solution

The fourth proportional to 720,520.60, 994,369.91 and 398,223.76 is: 549,577.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,520.60 : 994,369.91 = 398,223.76 : x
  2. Step 2: Convert to fraction form
    720,520.60/994,369.91 = 398,223.76/x
  3. Step 3: Cross multiply
    720,520.60x = 994,369.91 × 398,223.76
  4. Step 4: Simplify right side
    720,520.60x = 395,981,724,391.06
  5. Step 5: Solve for x
    x = 395,981,724,391.06/720,520.60
  6. Step 6: Final answer
    x = 549,577.24

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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.