Home / 1,287,400.09-1,931,280.63-388,739.92

Finding the Fourth Proportional to 1,287,400.09, 1,931,280.63 and 388,739.92

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Solution

The fourth proportional to 1,287,400.09, 1,931,280.63 and 388,739.92 is: 583,164.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,400.09 : 1,931,280.63 = 388,739.92 : x
  2. Step 2: Convert to fraction form
    1,287,400.09/1,931,280.63 = 388,739.92/x
  3. Step 3: Cross multiply
    1,287,400.09x = 1,931,280.63 × 388,739.92
  4. Step 4: Simplify right side
    1,287,400.09x = 750,765,877,603.75
  5. Step 5: Solve for x
    x = 750,765,877,603.75/1,287,400.09
  6. Step 6: Final answer
    x = 583,164.38

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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.