Home / 1,188,222.30-1,639,315.95-780,543.66

Finding the Fourth Proportional to 1,188,222.30, 1,639,315.95 and 780,543.66

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Solution

The fourth proportional to 1,188,222.30, 1,639,315.95 and 780,543.66 is: 1,076,867.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,222.30 : 1,639,315.95 = 780,543.66 : x
  2. Step 2: Convert to fraction form
    1,188,222.30/1,639,315.95 = 780,543.66/x
  3. Step 3: Cross multiply
    1,188,222.30x = 1,639,315.95 × 780,543.66
  4. Step 4: Simplify right side
    1,188,222.30x = 1,279,557,671,509.38
  5. Step 5: Solve for x
    x = 1,279,557,671,509.38/1,188,222.30
  6. Step 6: Final answer
    x = 1,076,867.24

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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.