Home / 763,690,991.20-1,145,536,486.80-278,953,813.60

Finding the Fourth Proportional to 763,690,991.20, 1,145,536,486.80 and 278,953,813.60

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Solution

The fourth proportional to 763,690,991.20, 1,145,536,486.80 and 278,953,813.60 is: 418,430,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,690,991.20 : 1,145,536,486.80 = 278,953,813.60 : x
  2. Step 2: Convert to fraction form
    763,690,991.20/1,145,536,486.80 = 278,953,813.60/x
  3. Step 3: Cross multiply
    763,690,991.20x = 1,145,536,486.80 × 278,953,813.60
  4. Step 4: Simplify right side
    763,690,991.20x = 319,551,771,610,806,080
  5. Step 5: Solve for x
    x = 319,551,771,610,806,080/763,690,991.20
  6. Step 6: Final answer
    x = 418,430,720.40

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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.