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Finding the Fourth Proportional to 470,279.28, 648,990.09 and 255,423.54

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Solution

The fourth proportional to 470,279.28, 648,990.09 and 255,423.54 is: 352,487.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,279.28 : 648,990.09 = 255,423.54 : x
  2. Step 2: Convert to fraction form
    470,279.28/648,990.09 = 255,423.54/x
  3. Step 3: Cross multiply
    470,279.28x = 648,990.09 × 255,423.54
  4. Step 4: Simplify right side
    470,279.28x = 165,767,346,212.72
  5. Step 5: Solve for x
    x = 165,767,346,212.72/470,279.28
  6. Step 6: Final answer
    x = 352,487.03

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1.5x scale

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.