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Finding the Fourth Proportional to 387,809.78, 535,254.14 and 251,652.56

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Solution

The fourth proportional to 387,809.78, 535,254.14 and 251,652.56 is: 347,330.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,809.78 : 535,254.14 = 251,652.56 : x
  2. Step 2: Convert to fraction form
    387,809.78/535,254.14 = 251,652.56/x
  3. Step 3: Cross multiply
    387,809.78x = 535,254.14 × 251,652.56
  4. Step 4: Simplify right side
    387,809.78x = 134,698,072,534.46
  5. Step 5: Solve for x
    x = 134,698,072,534.46/387,809.78
  6. Step 6: Final answer
    x = 347,330.27

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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.