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Finding the Fourth Proportional to 879,877, 1,319,815.50 and 318,912.04

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Solution

The fourth proportional to 879,877, 1,319,815.50 and 318,912.04 is: 478,368.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,877 : 1,319,815.50 = 318,912.04 : x
  2. Step 2: Convert to fraction form
    879,877/1,319,815.50 = 318,912.04/x
  3. Step 3: Cross multiply
    879,877x = 1,319,815.50 × 318,912.04
  4. Step 4: Simplify right side
    879,877x = 420,905,053,528.62
  5. Step 5: Solve for x
    x = 420,905,053,528.62/879,877
  6. Step 6: Final answer
    x = 478,368.06

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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.