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Finding the Fourth Proportional to 718,379.10, 991,362.30 and 396,094.26

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Solution

The fourth proportional to 718,379.10, 991,362.30 and 396,094.26 is: 546,609.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,379.10 : 991,362.30 = 396,094.26 : x
  2. Step 2: Convert to fraction form
    718,379.10/991,362.30 = 396,094.26/x
  3. Step 3: Cross multiply
    718,379.10x = 991,362.30 × 396,094.26
  4. Step 4: Simplify right side
    718,379.10x = 392,672,916,610.40
  5. Step 5: Solve for x
    x = 392,672,916,610.40/718,379.10
  6. Step 6: Final answer
    x = 546,609.61

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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.