Home / 1,313,319.78-1,812,381.30-709,707.78

Finding the Fourth Proportional to 1,313,319.78, 1,812,381.30 and 709,707.78

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Solution

The fourth proportional to 1,313,319.78, 1,812,381.30 and 709,707.78 is: 979,396.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313,319.78 : 1,812,381.30 = 709,707.78 : x
  2. Step 2: Convert to fraction form
    1,313,319.78/1,812,381.30 = 709,707.78/x
  3. Step 3: Cross multiply
    1,313,319.78x = 1,812,381.30 × 709,707.78
  4. Step 4: Simplify right side
    1,313,319.78x = 1,286,261,108,936.51
  5. Step 5: Solve for x
    x = 1,286,261,108,936.51/1,313,319.78
  6. Step 6: Final answer
    x = 979,396.74

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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.