Home / 687,486.63-948,845.57-401,006.78

Finding the Fourth Proportional to 687,486.63, 948,845.57 and 401,006.78

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Solution

The fourth proportional to 687,486.63, 948,845.57 and 401,006.78 is: 553,455.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,486.63 : 948,845.57 = 401,006.78 : x
  2. Step 2: Convert to fraction form
    687,486.63/948,845.57 = 401,006.78/x
  3. Step 3: Cross multiply
    687,486.63x = 948,845.57 × 401,006.78
  4. Step 4: Simplify right side
    687,486.63x = 380,493,499,993.70
  5. Step 5: Solve for x
    x = 380,493,499,993.70/687,486.63
  6. Step 6: Final answer
    x = 553,455.85

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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.