Home / 398,559,938.20-597,839,907.30-289,720,821.40

Finding the Fourth Proportional to 398,559,938.20, 597,839,907.30 and 289,720,821.40

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Solution

The fourth proportional to 398,559,938.20, 597,839,907.30 and 289,720,821.40 is: 434,581,232.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,559,938.20 : 597,839,907.30 = 289,720,821.40 : x
  2. Step 2: Convert to fraction form
    398,559,938.20/597,839,907.30 = 289,720,821.40/x
  3. Step 3: Cross multiply
    398,559,938.20x = 597,839,907.30 × 289,720,821.40
  4. Step 4: Simplify right side
    398,559,938.20x = 173,206,669,008,655,840
  5. Step 5: Solve for x
    x = 173,206,669,008,655,840/398,559,938.20
  6. Step 6: Final answer
    x = 434,581,232.10

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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.