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Finding the Fourth Proportional to 385,619.89, 577,676.52 and 265,655.65

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Solution

The fourth proportional to 385,619.89, 577,676.52 and 265,655.65 is: 397,964.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,619.89 : 577,676.52 = 265,655.65 : x
  2. Step 2: Convert to fraction form
    385,619.89/577,676.52 = 265,655.65/x
  3. Step 3: Cross multiply
    385,619.89x = 577,676.52 × 265,655.65
  4. Step 4: Simplify right side
    385,619.89x = 153,463,031,410.34
  5. Step 5: Solve for x
    x = 153,463,031,410.34/385,619.89
  6. Step 6: Final answer
    x = 397,964.51

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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.