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Finding the Fourth Proportional to 386,009.10, 579,650.31 and 260,455.86

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Solution

The fourth proportional to 386,009.10, 579,650.31 and 260,455.86 is: 391,113.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,009.10 : 579,650.31 = 260,455.86 : x
  2. Step 2: Convert to fraction form
    386,009.10/579,650.31 = 260,455.86/x
  3. Step 3: Cross multiply
    386,009.10x = 579,650.31 × 260,455.86
  4. Step 4: Simplify right side
    386,009.10x = 150,973,319,990.32
  5. Step 5: Solve for x
    x = 150,973,319,990.32/386,009.10
  6. Step 6: Final answer
    x = 391,113.37

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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.