Home / 763,855.71-1,054,128.09-419,698.86

Finding the Fourth Proportional to 763,855.71, 1,054,128.09 and 419,698.86

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Solution

The fourth proportional to 763,855.71, 1,054,128.09 and 419,698.86 is: 579,188.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,855.71 : 1,054,128.09 = 419,698.86 : x
  2. Step 2: Convert to fraction form
    763,855.71/1,054,128.09 = 419,698.86/x
  3. Step 3: Cross multiply
    763,855.71x = 1,054,128.09 × 419,698.86
  4. Step 4: Simplify right side
    763,855.71x = 442,416,357,666.98
  5. Step 5: Solve for x
    x = 442,416,357,666.98/763,855.71
  6. Step 6: Final answer
    x = 579,188.39

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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.