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Finding the Fourth Proportional to 520,090.60, 780,135.90 and 296,141.80

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Solution

The fourth proportional to 520,090.60, 780,135.90 and 296,141.80 is: 444,212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,090.60 : 780,135.90 = 296,141.80 : x
  2. Step 2: Convert to fraction form
    520,090.60/780,135.90 = 296,141.80/x
  3. Step 3: Cross multiply
    520,090.60x = 780,135.90 × 296,141.80
  4. Step 4: Simplify right side
    520,090.60x = 231,030,849,670.62
  5. Step 5: Solve for x
    x = 231,030,849,670.62/520,090.60
  6. Step 6: Final answer
    x = 444,212.70

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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.