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Finding the Fourth Proportional to 620,983.20, 931,474.80 and 620,983.20

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Solution

The fourth proportional to 620,983.20, 931,474.80 and 620,983.20 is: 931,474.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,983.20 : 931,474.80 = 620,983.20 : x
  2. Step 2: Convert to fraction form
    620,983.20/931,474.80 = 620,983.20/x
  3. Step 3: Cross multiply
    620,983.20x = 931,474.80 × 620,983.20
  4. Step 4: Simplify right side
    620,983.20x = 578,430,202,023.36
  5. Step 5: Solve for x
    x = 578,430,202,023.36/620,983.20
  6. Step 6: Final answer
    x = 931,474.80

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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.