Home / 1,290,325.20-1,780,687.26-709,518.12

Finding the Fourth Proportional to 1,290,325.20, 1,780,687.26 and 709,518.12

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Solution

The fourth proportional to 1,290,325.20, 1,780,687.26 and 709,518.12 is: 979,156.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,325.20 : 1,780,687.26 = 709,518.12 : x
  2. Step 2: Convert to fraction form
    1,290,325.20/1,780,687.26 = 709,518.12/x
  3. Step 3: Cross multiply
    1,290,325.20x = 1,780,687.26 × 709,518.12
  4. Step 4: Simplify right side
    1,290,325.20x = 1,263,429,877,023.15
  5. Step 5: Solve for x
    x = 1,263,429,877,023.15/1,290,325.20
  6. Step 6: Final answer
    x = 979,156.17

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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.