Home / 398,765,000.20-597,139,730.70-318,143,432.20

Finding the Fourth Proportional to 398,765,000.20, 597,139,730.70 and 318,143,432.20

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Solution

The fourth proportional to 398,765,000.20, 597,139,730.70 and 318,143,432.20 is: 476,411,127.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,765,000.20 : 597,139,730.70 = 318,143,432.20 : x
  2. Step 2: Convert to fraction form
    398,765,000.20/597,139,730.70 = 318,143,432.20/x
  3. Step 3: Cross multiply
    398,765,000.20x = 597,139,730.70 × 318,143,432.20
  4. Step 4: Simplify right side
    398,765,000.20x = 189,976,083,427,881,728
  5. Step 5: Solve for x
    x = 189,976,083,427,881,728/398,765,000.20
  6. Step 6: Final answer
    x = 476,411,127.69

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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.