Home / 1,638,687,304.78-2,456,974,122.92-642,808,959.61

Finding the Fourth Proportional to 1,638,687,304.78, 2,456,974,122.92 and 642,808,959.61

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Solution

The fourth proportional to 1,638,687,304.78, 2,456,974,122.92 and 642,808,959.61 is: 963,798,874.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638,687,304.78 : 2,456,974,122.92 = 642,808,959.61 : x
  2. Step 2: Convert to fraction form
    1,638,687,304.78/2,456,974,122.92 = 642,808,959.61/x
  3. Step 3: Cross multiply
    1,638,687,304.78x = 2,456,974,122.92 × 642,808,959.61
  4. Step 4: Simplify right side
    1,638,687,304.78x = 1,579,364,979,745,968,896
  5. Step 5: Solve for x
    x = 1,579,364,979,745,968,896/1,638,687,304.78
  6. Step 6: Final answer
    x = 963,798,874.34

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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.