Home / 1,289,519.18-1,779,700.12-780,225.74

Finding the Fourth Proportional to 1,289,519.18, 1,779,700.12 and 780,225.74

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Solution

The fourth proportional to 1,289,519.18, 1,779,700.12 and 780,225.74 is: 1,076,810.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,519.18 : 1,779,700.12 = 780,225.74 : x
  2. Step 2: Convert to fraction form
    1,289,519.18/1,779,700.12 = 780,225.74/x
  3. Step 3: Cross multiply
    1,289,519.18x = 1,779,700.12 × 780,225.74
  4. Step 4: Simplify right side
    1,289,519.18x = 1,388,567,843,105.09
  5. Step 5: Solve for x
    x = 1,388,567,843,105.09/1,289,519.18
  6. Step 6: Final answer
    x = 1,076,810.54

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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.