Home / 809,816,606.78-1,117,547,995.11-438,539,278.46

Finding the Fourth Proportional to 809,816,606.78, 1,117,547,995.11 and 438,539,278.46

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Solution

The fourth proportional to 809,816,606.78, 1,117,547,995.11 and 438,539,278.46 is: 605,184,787.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,816,606.78 : 1,117,547,995.11 = 438,539,278.46 : x
  2. Step 2: Convert to fraction form
    809,816,606.78/1,117,547,995.11 = 438,539,278.46/x
  3. Step 3: Cross multiply
    809,816,606.78x = 1,117,547,995.11 × 438,539,278.46
  4. Step 4: Simplify right side
    809,816,606.78x = 490,088,691,419,958,912
  5. Step 5: Solve for x
    x = 490,088,691,419,958,912/809,816,606.78
  6. Step 6: Final answer
    x = 605,184,787.91

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1.5x scale

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.