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Finding the Fourth Proportional to 425,557,682.80, 638,619,959.40 and 195,408,300.40

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Solution

The fourth proportional to 425,557,682.80, 638,619,959.40 and 195,408,300.40 is: 293,242,598.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,557,682.80 : 638,619,959.40 = 195,408,300.40 : x
  2. Step 2: Convert to fraction form
    425,557,682.80/638,619,959.40 = 195,408,300.40/x
  3. Step 3: Cross multiply
    425,557,682.80x = 638,619,959.40 × 195,408,300.40
  4. Step 4: Simplify right side
    425,557,682.80x = 124,791,640,867,871,008
  5. Step 5: Solve for x
    x = 124,791,640,867,871,008/425,557,682.80
  6. Step 6: Final answer
    x = 293,242,598.86

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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.