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Finding the Fourth Proportional to 519,305.40, 778,881.30 and 145,366.20

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Solution

The fourth proportional to 519,305.40, 778,881.30 and 145,366.20 is: 218,027.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,305.40 : 778,881.30 = 145,366.20 : x
  2. Step 2: Convert to fraction form
    519,305.40/778,881.30 = 145,366.20/x
  3. Step 3: Cross multiply
    519,305.40x = 778,881.30 × 145,366.20
  4. Step 4: Simplify right side
    519,305.40x = 113,223,014,832.06
  5. Step 5: Solve for x
    x = 113,223,014,832.06/519,305.40
  6. Step 6: Final answer
    x = 218,027.80

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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.