Home / 1,290,238.34-1,780,574.57-709,505.78

Finding the Fourth Proportional to 1,290,238.34, 1,780,574.57 and 709,505.78

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Solution

The fourth proportional to 1,290,238.34, 1,780,574.57 and 709,505.78 is: 979,143.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,238.34 : 1,780,574.57 = 709,505.78 : x
  2. Step 2: Convert to fraction form
    1,290,238.34/1,780,574.57 = 709,505.78/x
  3. Step 3: Cross multiply
    1,290,238.34x = 1,780,574.57 × 709,505.78
  4. Step 4: Simplify right side
    1,290,238.34x = 1,263,327,936,685.61
  5. Step 5: Solve for x
    x = 1,263,327,936,685.61/1,290,238.34
  6. Step 6: Final answer
    x = 979,143.08

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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.