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Finding the Fourth Proportional to 387,889.21, 535,360.82 and 242,762.47

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Solution

The fourth proportional to 387,889.21, 535,360.82 and 242,762.47 is: 335,058.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,889.21 : 535,360.82 = 242,762.47 : x
  2. Step 2: Convert to fraction form
    387,889.21/535,360.82 = 242,762.47/x
  3. Step 3: Cross multiply
    387,889.21x = 535,360.82 × 242,762.47
  4. Step 4: Simplify right side
    387,889.21x = 129,965,513,134.98
  5. Step 5: Solve for x
    x = 129,965,513,134.98/387,889.21
  6. Step 6: Final answer
    x = 335,058.34

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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.