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Finding the Fourth Proportional to 718,993.79, 992,210.69 and 396,703.86

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Solution

The fourth proportional to 718,993.79, 992,210.69 and 396,703.86 is: 547,450.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,993.79 : 992,210.69 = 396,703.86 : x
  2. Step 2: Convert to fraction form
    718,993.79/992,210.69 = 396,703.86/x
  3. Step 3: Cross multiply
    718,993.79x = 992,210.69 × 396,703.86
  4. Step 4: Simplify right side
    718,993.79x = 393,613,810,299.75
  5. Step 5: Solve for x
    x = 393,613,810,299.75/718,993.79
  6. Step 6: Final answer
    x = 547,450.92

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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.