Home / 1,187,125.54-1,638,238.93-643,262.32

Finding the Fourth Proportional to 1,187,125.54, 1,638,238.93 and 643,262.32

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Solution

The fourth proportional to 1,187,125.54, 1,638,238.93 and 643,262.32 is: 887,705.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,125.54 : 1,638,238.93 = 643,262.32 : x
  2. Step 2: Convert to fraction form
    1,187,125.54/1,638,238.93 = 643,262.32/x
  3. Step 3: Cross multiply
    1,187,125.54x = 1,638,238.93 × 643,262.32
  4. Step 4: Simplify right side
    1,187,125.54x = 1,053,817,369,122.36
  5. Step 5: Solve for x
    x = 1,053,817,369,122.36/1,187,125.54
  6. Step 6: Final answer
    x = 887,705.08

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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.