Home / 398,468,308.38-550,062,590.51-257,408,307.84

Finding the Fourth Proportional to 398,468,308.38, 550,062,590.51 and 257,408,307.84

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Solution

The fourth proportional to 398,468,308.38, 550,062,590.51 and 257,408,307.84 is: 355,337,369.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,468,308.38 : 550,062,590.51 = 257,408,307.84 : x
  2. Step 2: Convert to fraction form
    398,468,308.38/550,062,590.51 = 257,408,307.84/x
  3. Step 3: Cross multiply
    398,468,308.38x = 550,062,590.51 × 257,408,307.84
  4. Step 4: Simplify right side
    398,468,308.38x = 141,590,680,627,978,896
  5. Step 5: Solve for x
    x = 141,590,680,627,978,896/398,468,308.38
  6. Step 6: Final answer
    x = 355,337,369.75

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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.