Home / 1,102,989.16-1,521,888.94-643,895.38

Finding the Fourth Proportional to 1,102,989.16, 1,521,888.94 and 643,895.38

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Solution

The fourth proportional to 1,102,989.16, 1,521,888.94 and 643,895.38 is: 888,437.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102,989.16 : 1,521,888.94 = 643,895.38 : x
  2. Step 2: Convert to fraction form
    1,102,989.16/1,521,888.94 = 643,895.38/x
  3. Step 3: Cross multiply
    1,102,989.16x = 1,521,888.94 × 643,895.38
  4. Step 4: Simplify right side
    1,102,989.16x = 979,937,257,339.10
  5. Step 5: Solve for x
    x = 979,937,257,339.10/1,102,989.16
  6. Step 6: Final answer
    x = 888,437.80

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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.