Home / 398,559,937.20-597,839,905.80-289,720,820.40

Finding the Fourth Proportional to 398,559,937.20, 597,839,905.80 and 289,720,820.40

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Solution

The fourth proportional to 398,559,937.20, 597,839,905.80 and 289,720,820.40 is: 434,581,230.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,559,937.20 : 597,839,905.80 = 289,720,820.40 : x
  2. Step 2: Convert to fraction form
    398,559,937.20/597,839,905.80 = 289,720,820.40/x
  3. Step 3: Cross multiply
    398,559,937.20x = 597,839,905.80 × 289,720,820.40
  4. Step 4: Simplify right side
    398,559,937.20x = 173,206,667,976,234,688
  5. Step 5: Solve for x
    x = 173,206,667,976,234,688/398,559,937.20
  6. Step 6: Final answer
    x = 434,581,230.60

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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.