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Finding the Fourth Proportional to 612,305,078.40, 918,457,617.60 and 440,118,194.40

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Solution

The fourth proportional to 612,305,078.40, 918,457,617.60 and 440,118,194.40 is: 660,177,291.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,305,078.40 : 918,457,617.60 = 440,118,194.40 : x
  2. Step 2: Convert to fraction form
    612,305,078.40/918,457,617.60 = 440,118,194.40/x
  3. Step 3: Cross multiply
    612,305,078.40x = 918,457,617.60 × 440,118,194.40
  4. Step 4: Simplify right side
    612,305,078.40x = 404,229,908,291,037,632
  5. Step 5: Solve for x
    x = 404,229,908,291,037,632/612,305,078.40
  6. Step 6: Final answer
    x = 660,177,291.60

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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.