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Finding the Fourth Proportional to 617,278.87, 851,877.93 and 345,330.55

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Solution

The fourth proportional to 617,278.87, 851,877.93 and 345,330.55 is: 476,574.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,278.87 : 851,877.93 = 345,330.55 : x
  2. Step 2: Convert to fraction form
    617,278.87/851,877.93 = 345,330.55/x
  3. Step 3: Cross multiply
    617,278.87x = 851,877.93 × 345,330.55
  4. Step 4: Simplify right side
    617,278.87x = 294,179,472,145.36
  5. Step 5: Solve for x
    x = 294,179,472,145.36/617,278.87
  6. Step 6: Final answer
    x = 476,574.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.