Home / 1,187,369.21-1,638,565.29-643,518.20

Finding the Fourth Proportional to 1,187,369.21, 1,638,565.29 and 643,518.20

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Solution

The fourth proportional to 1,187,369.21, 1,638,565.29 and 643,518.20 is: 888,052.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,369.21 : 1,638,565.29 = 643,518.20 : x
  2. Step 2: Convert to fraction form
    1,187,369.21/1,638,565.29 = 643,518.20/x
  3. Step 3: Cross multiply
    1,187,369.21x = 1,638,565.29 × 643,518.20
  4. Step 4: Simplify right side
    1,187,369.21x = 1,054,446,577,810.45
  5. Step 5: Solve for x
    x = 1,054,446,577,810.45/1,187,369.21
  6. Step 6: Final answer
    x = 888,052.83

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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.