Home / 1,287,582.12-1,931,283.78-389,028.57

Finding the Fourth Proportional to 1,287,582.12, 1,931,283.78 and 389,028.57

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Solution

The fourth proportional to 1,287,582.12, 1,931,283.78 and 389,028.57 is: 583,515.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,582.12 : 1,931,283.78 = 389,028.57 : x
  2. Step 2: Convert to fraction form
    1,287,582.12/1,931,283.78 = 389,028.57/x
  3. Step 3: Cross multiply
    1,287,582.12x = 1,931,283.78 × 389,028.57
  4. Step 4: Simplify right side
    1,287,582.12x = 751,324,558,496.42
  5. Step 5: Solve for x
    x = 751,324,558,496.42/1,287,582.12
  6. Step 6: Final answer
    x = 583,515.84

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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.