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Finding the Fourth Proportional to 423,272.47, 584,142.26 and 279,783.67

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Solution

The fourth proportional to 423,272.47, 584,142.26 and 279,783.67 is: 386,118.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,272.47 : 584,142.26 = 279,783.67 : x
  2. Step 2: Convert to fraction form
    423,272.47/584,142.26 = 279,783.67/x
  3. Step 3: Cross multiply
    423,272.47x = 584,142.26 × 279,783.67
  4. Step 4: Simplify right side
    423,272.47x = 163,433,463,905.98
  5. Step 5: Solve for x
    x = 163,433,463,905.98/423,272.47
  6. Step 6: Final answer
    x = 386,118.81

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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.