Home / 1,287,173.42-1,931,072.28-388,561.51

Finding the Fourth Proportional to 1,287,173.42, 1,931,072.28 and 388,561.51

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Solution

The fourth proportional to 1,287,173.42, 1,931,072.28 and 388,561.51 is: 582,936.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,173.42 : 1,931,072.28 = 388,561.51 : x
  2. Step 2: Convert to fraction form
    1,287,173.42/1,931,072.28 = 388,561.51/x
  3. Step 3: Cross multiply
    1,287,173.42x = 1,931,072.28 × 388,561.51
  4. Step 4: Simplify right side
    1,287,173.42x = 750,340,361,035.94
  5. Step 5: Solve for x
    x = 750,340,361,035.94/1,287,173.42
  6. Step 6: Final answer
    x = 582,936.49

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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.