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Finding the Fourth Proportional to 652,375,272.40, 978,562,908.60 and 221,553,768.40

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Solution

The fourth proportional to 652,375,272.40, 978,562,908.60 and 221,553,768.40 is: 332,330,652.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,375,272.40 : 978,562,908.60 = 221,553,768.40 : x
  2. Step 2: Convert to fraction form
    652,375,272.40/978,562,908.60 = 221,553,768.40/x
  3. Step 3: Cross multiply
    652,375,272.40x = 978,562,908.60 × 221,553,768.40
  4. Step 4: Simplify right side
    652,375,272.40x = 216,804,300,016,794,784
  5. Step 5: Solve for x
    x = 216,804,300,016,794,784/652,375,272.40
  6. Step 6: Final answer
    x = 332,330,652.60

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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.