Home / 398,820,779.88-550,664,208-257,775,451.53

Finding the Fourth Proportional to 398,820,779.88, 550,664,208 and 257,775,451.53

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Solution

The fourth proportional to 398,820,779.88, 550,664,208 and 257,775,451.53 is: 355,918,552.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,820,779.88 : 550,664,208 = 257,775,451.53 : x
  2. Step 2: Convert to fraction form
    398,820,779.88/550,664,208 = 257,775,451.53/x
  3. Step 3: Cross multiply
    398,820,779.88x = 550,664,208 × 257,775,451.53
  4. Step 4: Simplify right side
    398,820,779.88x = 141,947,714,858,609,840
  5. Step 5: Solve for x
    x = 141,947,714,858,609,840/398,820,779.88
  6. Step 6: Final answer
    x = 355,918,552.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.