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Finding the Fourth Proportional to 522,129.51, 720,399.81 and 301,310.85

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Solution

The fourth proportional to 522,129.51, 720,399.81 and 301,310.85 is: 415,728.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,129.51 : 720,399.81 = 301,310.85 : x
  2. Step 2: Convert to fraction form
    522,129.51/720,399.81 = 301,310.85/x
  3. Step 3: Cross multiply
    522,129.51x = 720,399.81 × 301,310.85
  4. Step 4: Simplify right side
    522,129.51x = 217,064,279,090.94
  5. Step 5: Solve for x
    x = 217,064,279,090.94/522,129.51
  6. Step 6: Final answer
    x = 415,728.81

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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.