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Finding the Fourth Proportional to 470,279.78, 648,990.78 and 255,424.04

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Solution

The fourth proportional to 470,279.78, 648,990.78 and 255,424.04 is: 352,487.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,279.78 : 648,990.78 = 255,424.04 : x
  2. Step 2: Convert to fraction form
    470,279.78/648,990.78 = 255,424.04/x
  3. Step 3: Cross multiply
    470,279.78x = 648,990.78 × 255,424.04
  4. Step 4: Simplify right side
    470,279.78x = 165,767,846,950.35
  5. Step 5: Solve for x
    x = 165,767,846,950.35/470,279.78
  6. Step 6: Final answer
    x = 352,487.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.