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Finding the Fourth Proportional to 478,474.04, 717,687.21 and 178,932.60

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Solution

The fourth proportional to 478,474.04, 717,687.21 and 178,932.60 is: 268,389.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,474.04 : 717,687.21 = 178,932.60 : x
  2. Step 2: Convert to fraction form
    478,474.04/717,687.21 = 178,932.60/x
  3. Step 3: Cross multiply
    478,474.04x = 717,687.21 × 178,932.60
  4. Step 4: Simplify right side
    478,474.04x = 128,417,637,801.05
  5. Step 5: Solve for x
    x = 128,417,637,801.05/478,474.04
  6. Step 6: Final answer
    x = 268,389.98

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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.