Home / 1,187,795.49-1,639,158.21-643,931.16

Finding the Fourth Proportional to 1,187,795.49, 1,639,158.21 and 643,931.16

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Solution

The fourth proportional to 1,187,795.49, 1,639,158.21 and 643,931.16 is: 888,625.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,795.49 : 1,639,158.21 = 643,931.16 : x
  2. Step 2: Convert to fraction form
    1,187,795.49/1,639,158.21 = 643,931.16/x
  3. Step 3: Cross multiply
    1,187,795.49x = 1,639,158.21 × 643,931.16
  4. Step 4: Simplify right side
    1,187,795.49x = 1,055,505,047,588.82
  5. Step 5: Solve for x
    x = 1,055,505,047,588.82/1,187,795.49
  6. Step 6: Final answer
    x = 888,625.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.