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Finding the Fourth Proportional to 319,005.80, 478,278.30 and 178,807.40

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Solution

The fourth proportional to 319,005.80, 478,278.30 and 178,807.40 is: 268,081.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,005.80 : 478,278.30 = 178,807.40 : x
  2. Step 2: Convert to fraction form
    319,005.80/478,278.30 = 178,807.40/x
  3. Step 3: Cross multiply
    319,005.80x = 478,278.30 × 178,807.40
  4. Step 4: Simplify right side
    319,005.80x = 85,519,699,299.42
  5. Step 5: Solve for x
    x = 85,519,699,299.42/319,005.80
  6. Step 6: Final answer
    x = 268,081.96

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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.