Home / 1,115,703.40-1,675,304.70-643,311.40

Finding the Fourth Proportional to 1,115,703.40, 1,675,304.70 and 643,311.40

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Solution

The fourth proportional to 1,115,703.40, 1,675,304.70 and 643,311.40 is: 965,975.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115,703.40 : 1,675,304.70 = 643,311.40 : x
  2. Step 2: Convert to fraction form
    1,115,703.40/1,675,304.70 = 643,311.40/x
  3. Step 3: Cross multiply
    1,115,703.40x = 1,675,304.70 × 643,311.40
  4. Step 4: Simplify right side
    1,115,703.40x = 1,077,742,611,983.58
  5. Step 5: Solve for x
    x = 1,077,742,611,983.58/1,115,703.40
  6. Step 6: Final answer
    x = 965,975.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.