Home / 1,187,027.60-1,638,095.79-643,178.10

Finding the Fourth Proportional to 1,187,027.60, 1,638,095.79 and 643,178.10

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Solution

The fourth proportional to 1,187,027.60, 1,638,095.79 and 643,178.10 is: 887,584.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,027.60 : 1,638,095.79 = 643,178.10 : x
  2. Step 2: Convert to fraction form
    1,187,027.60/1,638,095.79 = 643,178.10/x
  3. Step 3: Cross multiply
    1,187,027.60x = 1,638,095.79 × 643,178.10
  4. Step 4: Simplify right side
    1,187,027.60x = 1,053,587,341,925.44
  5. Step 5: Solve for x
    x = 1,053,587,341,925.44/1,187,027.60
  6. Step 6: Final answer
    x = 887,584.54

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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.