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Finding the Fourth Proportional to 353,859.47, 530,346.56 and 278,682.72

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Solution

The fourth proportional to 353,859.47, 530,346.56 and 278,682.72 is: 417,675.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,859.47 : 530,346.56 = 278,682.72 : x
  2. Step 2: Convert to fraction form
    353,859.47/530,346.56 = 278,682.72/x
  3. Step 3: Cross multiply
    353,859.47x = 530,346.56 × 278,682.72
  4. Step 4: Simplify right side
    353,859.47x = 147,798,420,490.03
  5. Step 5: Solve for x
    x = 147,798,420,490.03/353,859.47
  6. Step 6: Final answer
    x = 417,675.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.