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Finding the Fourth Proportional to 507,651.39, 761,478.84 and 128,571.93

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Solution

The fourth proportional to 507,651.39, 761,478.84 and 128,571.93 is: 192,858.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,651.39 : 761,478.84 = 128,571.93 : x
  2. Step 2: Convert to fraction form
    507,651.39/761,478.84 = 128,571.93/x
  3. Step 3: Cross multiply
    507,651.39x = 761,478.84 × 128,571.93
  4. Step 4: Simplify right side
    507,651.39x = 97,904,804,112.96
  5. Step 5: Solve for x
    x = 97,904,804,112.96/507,651.39
  6. Step 6: Final answer
    x = 192,858.34

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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.