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Finding the Fourth Proportional to 399,168,030.40, 557,474,753.60 and 399,168,030.40

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Solution

The fourth proportional to 399,168,030.40, 557,474,753.60 and 399,168,030.40 is: 557,474,753.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,168,030.40 : 557,474,753.60 = 399,168,030.40 : x
  2. Step 2: Convert to fraction form
    399,168,030.40/557,474,753.60 = 399,168,030.40/x
  3. Step 3: Cross multiply
    399,168,030.40x = 557,474,753.60 × 399,168,030.40
  4. Step 4: Simplify right side
    399,168,030.40x = 222,526,099,392,237,312
  5. Step 5: Solve for x
    x = 222,526,099,392,237,312/399,168,030.40
  6. Step 6: Final answer
    x = 557,474,753.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.