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Finding the Fourth Proportional to 402,991.20, 604,486.80 and 181,807.20

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Solution

The fourth proportional to 402,991.20, 604,486.80 and 181,807.20 is: 272,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,991.20 : 604,486.80 = 181,807.20 : x
  2. Step 2: Convert to fraction form
    402,991.20/604,486.80 = 181,807.20/x
  3. Step 3: Cross multiply
    402,991.20x = 604,486.80 × 181,807.20
  4. Step 4: Simplify right side
    402,991.20x = 109,900,052,544.96
  5. Step 5: Solve for x
    x = 109,900,052,544.96/402,991.20
  6. Step 6: Final answer
    x = 272,710.80

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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.