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Finding the Fourth Proportional to 978,290.32, 1,467,436.40 and 787,857.72

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Solution

The fourth proportional to 978,290.32, 1,467,436.40 and 787,857.72 is: 1,181,787.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,290.32 : 1,467,436.40 = 787,857.72 : x
  2. Step 2: Convert to fraction form
    978,290.32/1,467,436.40 = 787,857.72/x
  3. Step 3: Cross multiply
    978,290.32x = 1,467,436.40 × 787,857.72
  4. Step 4: Simplify right side
    978,290.32x = 1,156,131,096,349.01
  5. Step 5: Solve for x
    x = 1,156,131,096,349.01/978,290.32
  6. Step 6: Final answer
    x = 1,181,787.32

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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.