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Finding the Fourth Proportional to 519,498.56, 778,718.81 and 330,098.90

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Solution

The fourth proportional to 519,498.56, 778,718.81 and 330,098.90 is: 494,812.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,498.56 : 778,718.81 = 330,098.90 : x
  2. Step 2: Convert to fraction form
    519,498.56/778,718.81 = 330,098.90/x
  3. Step 3: Cross multiply
    519,498.56x = 778,718.81 × 330,098.90
  4. Step 4: Simplify right side
    519,498.56x = 257,054,219,521.96
  5. Step 5: Solve for x
    x = 257,054,219,521.96/519,498.56
  6. Step 6: Final answer
    x = 494,812.19

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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.