Home / 645,109.88-890,282.02-358,634.75

Finding the Fourth Proportional to 645,109.88, 890,282.02 and 358,634.75

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Solution

The fourth proportional to 645,109.88, 890,282.02 and 358,634.75 is: 494,932.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,109.88 : 890,282.02 = 358,634.75 : x
  2. Step 2: Convert to fraction form
    645,109.88/890,282.02 = 358,634.75/x
  3. Step 3: Cross multiply
    645,109.88x = 890,282.02 × 358,634.75
  4. Step 4: Simplify right side
    645,109.88x = 319,286,069,672.20
  5. Step 5: Solve for x
    x = 319,286,069,672.20/645,109.88
  6. Step 6: Final answer
    x = 494,932.85

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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.