Home / 645,069.12-890,065.44-376,745.28

Finding the Fourth Proportional to 645,069.12, 890,065.44 and 376,745.28

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Solution

The fourth proportional to 645,069.12, 890,065.44 and 376,745.28 is: 519,832.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,069.12 : 890,065.44 = 376,745.28 : x
  2. Step 2: Convert to fraction form
    645,069.12/890,065.44 = 376,745.28/x
  3. Step 3: Cross multiply
    645,069.12x = 890,065.44 × 376,745.28
  4. Step 4: Simplify right side
    645,069.12x = 335,327,953,411.12
  5. Step 5: Solve for x
    x = 335,327,953,411.12/645,069.12
  6. Step 6: Final answer
    x = 519,832.59

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1.5x scale

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.