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Finding the Fourth Proportional to 518,009.80, 777,014.70 and 378,041.80

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Solution

The fourth proportional to 518,009.80, 777,014.70 and 378,041.80 is: 567,062.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,009.80 : 777,014.70 = 378,041.80 : x
  2. Step 2: Convert to fraction form
    518,009.80/777,014.70 = 378,041.80/x
  3. Step 3: Cross multiply
    518,009.80x = 777,014.70 × 378,041.80
  4. Step 4: Simplify right side
    518,009.80x = 293,744,035,814.46
  5. Step 5: Solve for x
    x = 293,744,035,814.46/518,009.80
  6. Step 6: Final answer
    x = 567,062.70

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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.