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Finding the Fourth Proportional to 470,460.23, 705,690.90 and 128,906.57

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Solution

The fourth proportional to 470,460.23, 705,690.90 and 128,906.57 is: 193,360.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,460.23 : 705,690.90 = 128,906.57 : x
  2. Step 2: Convert to fraction form
    470,460.23/705,690.90 = 128,906.57/x
  3. Step 3: Cross multiply
    470,460.23x = 705,690.90 × 128,906.57
  4. Step 4: Simplify right side
    470,460.23x = 90,968,193,399.21
  5. Step 5: Solve for x
    x = 90,968,193,399.21/470,460.23
  6. Step 6: Final answer
    x = 193,360.01

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1.5x scale

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.