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Finding the Fourth Proportional to 718,914.08, 992,104.72 and 396,624

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Solution

The fourth proportional to 718,914.08, 992,104.72 and 396,624 is: 547,342.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,914.08 : 992,104.72 = 396,624 : x
  2. Step 2: Convert to fraction form
    718,914.08/992,104.72 = 396,624/x
  3. Step 3: Cross multiply
    718,914.08x = 992,104.72 × 396,624
  4. Step 4: Simplify right side
    718,914.08x = 393,492,542,465.28
  5. Step 5: Solve for x
    x = 393,492,542,465.28/718,914.08
  6. Step 6: Final answer
    x = 547,342.93

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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.