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Finding the Fourth Proportional to 470,821.20, 706,231.80 and 155,237.10

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Solution

The fourth proportional to 470,821.20, 706,231.80 and 155,237.10 is: 232,855.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,821.20 : 706,231.80 = 155,237.10 : x
  2. Step 2: Convert to fraction form
    470,821.20/706,231.80 = 155,237.10/x
  3. Step 3: Cross multiply
    470,821.20x = 706,231.80 × 155,237.10
  4. Step 4: Simplify right side
    470,821.20x = 109,633,376,559.78
  5. Step 5: Solve for x
    x = 109,633,376,559.78/470,821.20
  6. Step 6: Final answer
    x = 232,855.65

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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.