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Finding the Fourth Proportional to 667,703.69, 921,429.80 and 361,788.35

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Solution

The fourth proportional to 667,703.69, 921,429.80 and 361,788.35 is: 499,267.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,703.69 : 921,429.80 = 361,788.35 : x
  2. Step 2: Convert to fraction form
    667,703.69/921,429.80 = 361,788.35/x
  3. Step 3: Cross multiply
    667,703.69x = 921,429.80 × 361,788.35
  4. Step 4: Simplify right side
    667,703.69x = 333,362,567,106.49
  5. Step 5: Solve for x
    x = 333,362,567,106.49/667,703.69
  6. Step 6: Final answer
    x = 499,267.22

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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.