Home / 1,399,089.80-1,930,686.90-826,315.40

Finding the Fourth Proportional to 1,399,089.80, 1,930,686.90 and 826,315.40

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Solution

The fourth proportional to 1,399,089.80, 1,930,686.90 and 826,315.40 is: 1,140,281.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,089.80 : 1,930,686.90 = 826,315.40 : x
  2. Step 2: Convert to fraction form
    1,399,089.80/1,930,686.90 = 826,315.40/x
  3. Step 3: Cross multiply
    1,399,089.80x = 1,930,686.90 × 826,315.40
  4. Step 4: Simplify right side
    1,399,089.80x = 1,595,356,318,048.26
  5. Step 5: Solve for x
    x = 1,595,356,318,048.26/1,399,089.80
  6. Step 6: Final answer
    x = 1,140,281.57

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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.