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Finding the Fourth Proportional to 385,336.40, 578,047.80 and 119,094.80

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Solution

The fourth proportional to 385,336.40, 578,047.80 and 119,094.80 is: 178,655.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,336.40 : 578,047.80 = 119,094.80 : x
  2. Step 2: Convert to fraction form
    385,336.40/578,047.80 = 119,094.80/x
  3. Step 3: Cross multiply
    385,336.40x = 578,047.80 × 119,094.80
  4. Step 4: Simplify right side
    385,336.40x = 68,842,487,131.44
  5. Step 5: Solve for x
    x = 68,842,487,131.44/385,336.40
  6. Step 6: Final answer
    x = 178,655.55

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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.