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Finding the Fourth Proportional to 398,638,485.60, 597,957,728.40 and 398,638,485.60

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Solution

The fourth proportional to 398,638,485.60, 597,957,728.40 and 398,638,485.60 is: 597,957,728.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,638,485.60 : 597,957,728.40 = 398,638,485.60 : x
  2. Step 2: Convert to fraction form
    398,638,485.60/597,957,728.40 = 398,638,485.60/x
  3. Step 3: Cross multiply
    398,638,485.60x = 597,957,728.40 × 398,638,485.60
  4. Step 4: Simplify right side
    398,638,485.60x = 238,368,963,302,192,128
  5. Step 5: Solve for x
    x = 238,368,963,302,192,128/398,638,485.60
  6. Step 6: Final answer
    x = 597,957,728.40

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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.