Home / 1,391,493.78-2,087,538.57-431,928.32

Finding the Fourth Proportional to 1,391,493.78, 2,087,538.57 and 431,928.32

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Solution

The fourth proportional to 1,391,493.78, 2,087,538.57 and 431,928.32 is: 647,984.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,493.78 : 2,087,538.57 = 431,928.32 : x
  2. Step 2: Convert to fraction form
    1,391,493.78/2,087,538.57 = 431,928.32/x
  3. Step 3: Cross multiply
    1,391,493.78x = 2,087,538.57 × 431,928.32
  4. Step 4: Simplify right side
    1,391,493.78x = 901,667,017,037.61
  5. Step 5: Solve for x
    x = 901,667,017,037.61/1,391,493.78
  6. Step 6: Final answer
    x = 647,984.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.