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Finding the Fourth Proportional to 470,888.40, 705,718.20 and 218,139.60

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Solution

The fourth proportional to 470,888.40, 705,718.20 and 218,139.60 is: 326,924.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,888.40 : 705,718.20 = 218,139.60 : x
  2. Step 2: Convert to fraction form
    470,888.40/705,718.20 = 218,139.60/x
  3. Step 3: Cross multiply
    470,888.40x = 705,718.20 × 218,139.60
  4. Step 4: Simplify right side
    470,888.40x = 153,945,085,860.72
  5. Step 5: Solve for x
    x = 153,945,085,860.72/470,888.40
  6. Step 6: Final answer
    x = 326,924.78

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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.