Home / 718,904.57-992,081.52-396,617.31

Finding the Fourth Proportional to 718,904.57, 992,081.52 and 396,617.31

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Solution

The fourth proportional to 718,904.57, 992,081.52 and 396,617.31 is: 547,328.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,904.57 : 992,081.52 = 396,617.31 : x
  2. Step 2: Convert to fraction form
    718,904.57/992,081.52 = 396,617.31/x
  3. Step 3: Cross multiply
    718,904.57x = 992,081.52 × 396,617.31
  4. Step 4: Simplify right side
    718,904.57x = 393,476,703,763.11
  5. Step 5: Solve for x
    x = 393,476,703,763.11/718,904.57
  6. Step 6: Final answer
    x = 547,328.15

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Double scale
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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.