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Finding the Fourth Proportional to 470,739.60, 706,109.40 and 155,120.40

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Solution

The fourth proportional to 470,739.60, 706,109.40 and 155,120.40 is: 232,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,739.60 : 706,109.40 = 155,120.40 : x
  2. Step 2: Convert to fraction form
    470,739.60/706,109.40 = 155,120.40/x
  3. Step 3: Cross multiply
    470,739.60x = 706,109.40 × 155,120.40
  4. Step 4: Simplify right side
    470,739.60x = 109,531,972,571.76
  5. Step 5: Solve for x
    x = 109,531,972,571.76/470,739.60
  6. Step 6: Final answer
    x = 232,680.60

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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.