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Finding the Fourth Proportional to 879,460, 1,319,123.68 and 280,396.96

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Solution

The fourth proportional to 879,460, 1,319,123.68 and 280,396.96 is: 420,574.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,460 : 1,319,123.68 = 280,396.96 : x
  2. Step 2: Convert to fraction form
    879,460/1,319,123.68 = 280,396.96/x
  3. Step 3: Cross multiply
    879,460x = 1,319,123.68 × 280,396.96
  4. Step 4: Simplify right side
    879,460x = 369,878,269,736.01
  5. Step 5: Solve for x
    x = 369,878,269,736.01/879,460
  6. Step 6: Final answer
    x = 420,574.30

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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.