Home / 387,128.45-533,865.50-251,112.77

Finding the Fourth Proportional to 387,128.45, 533,865.50 and 251,112.77

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Solution

The fourth proportional to 387,128.45, 533,865.50 and 251,112.77 is: 346,294.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,128.45 : 533,865.50 = 251,112.77 : x
  2. Step 2: Convert to fraction form
    387,128.45/533,865.50 = 251,112.77/x
  3. Step 3: Cross multiply
    387,128.45x = 533,865.50 × 251,112.77
  4. Step 4: Simplify right side
    387,128.45x = 134,060,446,474.88
  5. Step 5: Solve for x
    x = 134,060,446,474.88/387,128.45
  6. Step 6: Final answer
    x = 346,294.48

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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.