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Finding the Fourth Proportional to 418,350.90, 626,835.15 and 356,142.90

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Solution

The fourth proportional to 418,350.90, 626,835.15 and 356,142.90 is: 533,625.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,350.90 : 626,835.15 = 356,142.90 : x
  2. Step 2: Convert to fraction form
    418,350.90/626,835.15 = 356,142.90/x
  3. Step 3: Cross multiply
    418,350.90x = 626,835.15 × 356,142.90
  4. Step 4: Simplify right side
    418,350.90x = 223,242,888,142.94
  5. Step 5: Solve for x
    x = 223,242,888,142.94/418,350.90
  6. Step 6: Final answer
    x = 533,625.93

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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.