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Finding the Fourth Proportional to 470,921.70, 706,382.55 and 155,337.60

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Solution

The fourth proportional to 470,921.70, 706,382.55 and 155,337.60 is: 233,006.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,921.70 : 706,382.55 = 155,337.60 : x
  2. Step 2: Convert to fraction form
    470,921.70/706,382.55 = 155,337.60/x
  3. Step 3: Cross multiply
    470,921.70x = 706,382.55 × 155,337.60
  4. Step 4: Simplify right side
    470,921.70x = 109,727,769,998.88
  5. Step 5: Solve for x
    x = 109,727,769,998.88/470,921.70
  6. Step 6: Final answer
    x = 233,006.40

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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.