Home / 1,129,157.75-1,558,036.76-639,124.86

Finding the Fourth Proportional to 1,129,157.75, 1,558,036.76 and 639,124.86

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Solution

The fourth proportional to 1,129,157.75, 1,558,036.76 and 639,124.86 is: 881,878.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129,157.75 : 1,558,036.76 = 639,124.86 : x
  2. Step 2: Convert to fraction form
    1,129,157.75/1,558,036.76 = 639,124.86/x
  3. Step 3: Cross multiply
    1,129,157.75x = 1,558,036.76 × 639,124.86
  4. Step 4: Simplify right side
    1,129,157.75x = 995,780,026,109.85
  5. Step 5: Solve for x
    x = 995,780,026,109.85/1,129,157.75
  6. Step 6: Final answer
    x = 881,878.57

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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.