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Finding the Fourth Proportional to 667,879.40, 921,726.06 and 413,312.60

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Solution

The fourth proportional to 667,879.40, 921,726.06 and 413,312.60 is: 570,403.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,879.40 : 921,726.06 = 413,312.60 : x
  2. Step 2: Convert to fraction form
    667,879.40/921,726.06 = 413,312.60/x
  3. Step 3: Cross multiply
    667,879.40x = 921,726.06 × 413,312.60
  4. Step 4: Simplify right side
    667,879.40x = 380,960,994,346.36
  5. Step 5: Solve for x
    x = 380,960,994,346.36/667,879.40
  6. Step 6: Final answer
    x = 570,403.87

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1.5x scale

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.