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Finding the Fourth Proportional to 405,658,220.40, 608,487,330.60 and 405,658,220.40

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Solution

The fourth proportional to 405,658,220.40, 608,487,330.60 and 405,658,220.40 is: 608,487,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,658,220.40 : 608,487,330.60 = 405,658,220.40 : x
  2. Step 2: Convert to fraction form
    405,658,220.40/608,487,330.60 = 405,658,220.40/x
  3. Step 3: Cross multiply
    405,658,220.40x = 608,487,330.60 × 405,658,220.40
  4. Step 4: Simplify right side
    405,658,220.40x = 246,837,887,667,142,464
  5. Step 5: Solve for x
    x = 246,837,887,667,142,464/405,658,220.40
  6. Step 6: Final answer
    x = 608,487,330.60

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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.