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Finding the Fourth Proportional to 398,603,807.20, 597,905,710.80 and 343,121,366.80

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Solution

The fourth proportional to 398,603,807.20, 597,905,710.80 and 343,121,366.80 is: 514,682,050.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,603,807.20 : 597,905,710.80 = 343,121,366.80 : x
  2. Step 2: Convert to fraction form
    398,603,807.20/597,905,710.80 = 343,121,366.80/x
  3. Step 3: Cross multiply
    398,603,807.20x = 597,905,710.80 × 343,121,366.80
  4. Step 4: Simplify right side
    398,603,807.20x = 205,154,224,707,221,504
  5. Step 5: Solve for x
    x = 205,154,224,707,221,504/398,603,807.20
  6. Step 6: Final answer
    x = 514,682,050.20

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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.