Home / 718,443.41-991,416.28-408,305.45

Finding the Fourth Proportional to 718,443.41, 991,416.28 and 408,305.45

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Solution

The fourth proportional to 718,443.41, 991,416.28 and 408,305.45 is: 563,441.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,443.41 : 991,416.28 = 408,305.45 : x
  2. Step 2: Convert to fraction form
    718,443.41/991,416.28 = 408,305.45/x
  3. Step 3: Cross multiply
    718,443.41x = 991,416.28 × 408,305.45
  4. Step 4: Simplify right side
    718,443.41x = 404,800,670,926.08
  5. Step 5: Solve for x
    x = 404,800,670,926.08/718,443.41
  6. Step 6: Final answer
    x = 563,441.27

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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.