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Finding the Fourth Proportional to 620,780.40, 931,161.38 and 171,491.32

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Solution

The fourth proportional to 620,780.40, 931,161.38 and 171,491.32 is: 257,234.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,780.40 : 931,161.38 = 171,491.32 : x
  2. Step 2: Convert to fraction form
    620,780.40/931,161.38 = 171,491.32/x
  3. Step 3: Cross multiply
    620,780.40x = 931,161.38 × 171,491.32
  4. Step 4: Simplify right side
    620,780.40x = 159,686,094,189.22
  5. Step 5: Solve for x
    x = 159,686,094,189.22/620,780.40
  6. Step 6: Final answer
    x = 257,234.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.