Home / 1,287,212.48-1,931,130.84-388,600.56

Finding the Fourth Proportional to 1,287,212.48, 1,931,130.84 and 388,600.56

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Solution

The fourth proportional to 1,287,212.48, 1,931,130.84 and 388,600.56 is: 582,995.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,212.48 : 1,931,130.84 = 388,600.56 : x
  2. Step 2: Convert to fraction form
    1,287,212.48/1,931,130.84 = 388,600.56/x
  3. Step 3: Cross multiply
    1,287,212.48x = 1,931,130.84 × 388,600.56
  4. Step 4: Simplify right side
    1,287,212.48x = 750,438,525,857.27
  5. Step 5: Solve for x
    x = 750,438,525,857.27/1,287,212.48
  6. Step 6: Final answer
    x = 582,995.07

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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.