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Finding the Fourth Proportional to 718,292.26, 991,258.32 and 396,015.94

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Solution

The fourth proportional to 718,292.26, 991,258.32 and 396,015.94 is: 546,510.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,292.26 : 991,258.32 = 396,015.94 : x
  2. Step 2: Convert to fraction form
    718,292.26/991,258.32 = 396,015.94/x
  3. Step 3: Cross multiply
    718,292.26x = 991,258.32 × 396,015.94
  4. Step 4: Simplify right side
    718,292.26x = 392,554,095,377.62
  5. Step 5: Solve for x
    x = 392,554,095,377.62/718,292.26
  6. Step 6: Final answer
    x = 546,510.27

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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.