Home / 1,287,496.80-1,931,235.60-388,936.80

Finding the Fourth Proportional to 1,287,496.80, 1,931,235.60 and 388,936.80

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Solution

The fourth proportional to 1,287,496.80, 1,931,235.60 and 388,936.80 is: 583,402.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,496.80 : 1,931,235.60 = 388,936.80 : x
  2. Step 2: Convert to fraction form
    1,287,496.80/1,931,235.60 = 388,936.80/x
  3. Step 3: Cross multiply
    1,287,496.80x = 1,931,235.60 × 388,936.80
  4. Step 4: Simplify right side
    1,287,496.80x = 751,128,594,310.08
  5. Step 5: Solve for x
    x = 751,128,594,310.08/1,287,496.80
  6. Step 6: Final answer
    x = 583,402.30

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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.