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Finding the Fourth Proportional to 518,991.76, 716,192.31 and 304,274.80

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Solution

The fourth proportional to 518,991.76, 716,192.31 and 304,274.80 is: 419,889.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,991.76 : 716,192.31 = 304,274.80 : x
  2. Step 2: Convert to fraction form
    518,991.76/716,192.31 = 304,274.80/x
  3. Step 3: Cross multiply
    518,991.76x = 716,192.31 × 304,274.80
  4. Step 4: Simplify right side
    518,991.76x = 217,919,271,886.79
  5. Step 5: Solve for x
    x = 217,919,271,886.79/518,991.76
  6. Step 6: Final answer
    x = 419,889.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.