Home / 659,128.65-909,589.36-387,221.34

Finding the Fourth Proportional to 659,128.65, 909,589.36 and 387,221.34

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Solution

The fourth proportional to 659,128.65, 909,589.36 and 387,221.34 is: 534,360.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,128.65 : 909,589.36 = 387,221.34 : x
  2. Step 2: Convert to fraction form
    659,128.65/909,589.36 = 387,221.34/x
  3. Step 3: Cross multiply
    659,128.65x = 909,589.36 × 387,221.34
  4. Step 4: Simplify right side
    659,128.65x = 352,212,406,867.76
  5. Step 5: Solve for x
    x = 352,212,406,867.76/659,128.65
  6. Step 6: Final answer
    x = 534,360.64

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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.