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Finding the Fourth Proportional to 519,994.45, 779,419.20 and 340,005.65

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Solution

The fourth proportional to 519,994.45, 779,419.20 and 340,005.65 is: 509,634.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,994.45 : 779,419.20 = 340,005.65 : x
  2. Step 2: Convert to fraction form
    519,994.45/779,419.20 = 340,005.65/x
  3. Step 3: Cross multiply
    519,994.45x = 779,419.20 × 340,005.65
  4. Step 4: Simplify right side
    519,994.45x = 265,006,931,718.48
  5. Step 5: Solve for x
    x = 265,006,931,718.48/519,994.45
  6. Step 6: Final answer
    x = 509,634.16

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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.