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Finding the Fourth Proportional to 398,607,311.80, 597,910,967.70 and 360,343,559.80

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Solution

The fourth proportional to 398,607,311.80, 597,910,967.70 and 360,343,559.80 is: 540,515,339.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,607,311.80 : 597,910,967.70 = 360,343,559.80 : x
  2. Step 2: Convert to fraction form
    398,607,311.80/597,910,967.70 = 360,343,559.80/x
  3. Step 3: Cross multiply
    398,607,311.80x = 597,910,967.70 × 360,343,559.80
  4. Step 4: Simplify right side
    398,607,311.80x = 215,453,366,544,480,832
  5. Step 5: Solve for x
    x = 215,453,366,544,480,832/398,607,311.80
  6. Step 6: Final answer
    x = 540,515,339.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.