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Finding the Fourth Proportional to 667,879.15, 921,725.72 and 413,312.35

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Solution

The fourth proportional to 667,879.15, 921,725.72 and 413,312.35 is: 570,403.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,879.15 : 921,725.72 = 413,312.35 : x
  2. Step 2: Convert to fraction form
    667,879.15/921,725.72 = 413,312.35/x
  3. Step 3: Cross multiply
    667,879.15x = 921,725.72 × 413,312.35
  4. Step 4: Simplify right side
    667,879.15x = 380,960,621,322.08
  5. Step 5: Solve for x
    x = 380,960,621,322.08/667,879.15
  6. Step 6: Final answer
    x = 570,403.52

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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.