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Finding the Fourth Proportional to 620,945.28, 930,754.80 and 354,131.28

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Solution

The fourth proportional to 620,945.28, 930,754.80 and 354,131.28 is: 530,818.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,945.28 : 930,754.80 = 354,131.28 : x
  2. Step 2: Convert to fraction form
    620,945.28/930,754.80 = 354,131.28/x
  3. Step 3: Cross multiply
    620,945.28x = 930,754.80 × 354,131.28
  4. Step 4: Simplify right side
    620,945.28x = 329,609,388,690.14
  5. Step 5: Solve for x
    x = 329,609,388,690.14/620,945.28
  6. Step 6: Final answer
    x = 530,818.74

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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.