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Finding the Fourth Proportional to 518,871.05, 778,889.78 and 401,064.65

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Solution

The fourth proportional to 518,871.05, 778,889.78 and 401,064.65 is: 602,047.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,871.05 : 778,889.78 = 401,064.65 : x
  2. Step 2: Convert to fraction form
    518,871.05/778,889.78 = 401,064.65/x
  3. Step 3: Cross multiply
    518,871.05x = 778,889.78 × 401,064.65
  4. Step 4: Simplify right side
    518,871.05x = 312,385,154,998.95
  5. Step 5: Solve for x
    x = 312,385,154,998.95/518,871.05
  6. Step 6: Final answer
    x = 602,047.76

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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.