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Finding the Fourth Proportional to 485,131.40, 727,005.90 and 357,777.80

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Solution

The fourth proportional to 485,131.40, 727,005.90 and 357,777.80 is: 536,156.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,131.40 : 727,005.90 = 357,777.80 : x
  2. Step 2: Convert to fraction form
    485,131.40/727,005.90 = 357,777.80/x
  3. Step 3: Cross multiply
    485,131.40x = 727,005.90 × 357,777.80
  4. Step 4: Simplify right side
    485,131.40x = 260,106,571,489.02
  5. Step 5: Solve for x
    x = 260,106,571,489.02/485,131.40
  6. Step 6: Final answer
    x = 536,156.95

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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.