Home / 509,936,085.90-764,904,128.85-398,971,205.10

Finding the Fourth Proportional to 509,936,085.90, 764,904,128.85 and 398,971,205.10

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Solution

The fourth proportional to 509,936,085.90, 764,904,128.85 and 398,971,205.10 is: 598,456,807.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,936,085.90 : 764,904,128.85 = 398,971,205.10 : x
  2. Step 2: Convert to fraction form
    509,936,085.90/764,904,128.85 = 398,971,205.10/x
  3. Step 3: Cross multiply
    509,936,085.90x = 764,904,128.85 × 398,971,205.10
  4. Step 4: Simplify right side
    509,936,085.90x = 305,174,722,073,250,176
  5. Step 5: Solve for x
    x = 305,174,722,073,250,176/509,936,085.90
  6. Step 6: Final answer
    x = 598,456,807.65

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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.