Home / 1,318,866.40-1,976,744.40-687,455.20

Finding the Fourth Proportional to 1,318,866.40, 1,976,744.40 and 687,455.20

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Solution

The fourth proportional to 1,318,866.40, 1,976,744.40 and 687,455.20 is: 1,030,372.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,866.40 : 1,976,744.40 = 687,455.20 : x
  2. Step 2: Convert to fraction form
    1,318,866.40/1,976,744.40 = 687,455.20/x
  3. Step 3: Cross multiply
    1,318,866.40x = 1,976,744.40 × 687,455.20
  4. Step 4: Simplify right side
    1,318,866.40x = 1,358,923,216,850.88
  5. Step 5: Solve for x
    x = 1,358,923,216,850.88/1,318,866.40
  6. Step 6: Final answer
    x = 1,030,372.16

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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.