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Finding the Fourth Proportional to 934,999.40, 1,398,999.90 and 620,071.40

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Solution

The fourth proportional to 934,999.40, 1,398,999.90 and 620,071.40 is: 927,786.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    934,999.40 : 1,398,999.90 = 620,071.40 : x
  2. Step 2: Convert to fraction form
    934,999.40/1,398,999.90 = 620,071.40/x
  3. Step 3: Cross multiply
    934,999.40x = 1,398,999.90 × 620,071.40
  4. Step 4: Simplify right side
    934,999.40x = 867,479,826,592.86
  5. Step 5: Solve for x
    x = 867,479,826,592.86/934,999.40
  6. Step 6: Final answer
    x = 927,786.51

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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.