Home / 509,958,720.90-764,938,081.35-398,993,840.10

Finding the Fourth Proportional to 509,958,720.90, 764,938,081.35 and 398,993,840.10

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Solution

The fourth proportional to 509,958,720.90, 764,938,081.35 and 398,993,840.10 is: 598,490,760.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,958,720.90 : 764,938,081.35 = 398,993,840.10 : x
  2. Step 2: Convert to fraction form
    509,958,720.90/764,938,081.35 = 398,993,840.10/x
  3. Step 3: Cross multiply
    509,958,720.90x = 764,938,081.35 × 398,993,840.10
  4. Step 4: Simplify right side
    509,958,720.90x = 305,205,582,516,562,688
  5. Step 5: Solve for x
    x = 305,205,582,516,562,688/509,958,720.90
  6. Step 6: Final answer
    x = 598,490,760.15

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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.