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Finding the Fourth Proportional to 620,912.70, 931,369.05 and 453,607.20

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Solution

The fourth proportional to 620,912.70, 931,369.05 and 453,607.20 is: 680,410.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,912.70 : 931,369.05 = 453,607.20 : x
  2. Step 2: Convert to fraction form
    620,912.70/931,369.05 = 453,607.20/x
  3. Step 3: Cross multiply
    620,912.70x = 931,369.05 × 453,607.20
  4. Step 4: Simplify right side
    620,912.70x = 422,475,706,937.16
  5. Step 5: Solve for x
    x = 422,475,706,937.16/620,912.70
  6. Step 6: Final answer
    x = 680,410.80

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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.