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Finding the Fourth Proportional to 398,671,630.40, 598,007,445.60 and 398,671,630.40

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Solution

The fourth proportional to 398,671,630.40, 598,007,445.60 and 398,671,630.40 is: 598,007,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,671,630.40 : 598,007,445.60 = 398,671,630.40 : x
  2. Step 2: Convert to fraction form
    398,671,630.40/598,007,445.60 = 398,671,630.40/x
  3. Step 3: Cross multiply
    398,671,630.40x = 598,007,445.60 × 398,671,630.40
  4. Step 4: Simplify right side
    398,671,630.40x = 238,408,603,328,691,296
  5. Step 5: Solve for x
    x = 238,408,603,328,691,296/398,671,630.40
  6. Step 6: Final answer
    x = 598,007,445.60

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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.