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Finding the Fourth Proportional to 647,388.80, 893,400.40 and 375,618.54

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Solution

The fourth proportional to 647,388.80, 893,400.40 and 375,618.54 is: 518,355.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,388.80 : 893,400.40 = 375,618.54 : x
  2. Step 2: Convert to fraction form
    647,388.80/893,400.40 = 375,618.54/x
  3. Step 3: Cross multiply
    647,388.80x = 893,400.40 × 375,618.54
  4. Step 4: Simplify right side
    647,388.80x = 335,577,753,883.42
  5. Step 5: Solve for x
    x = 335,577,753,883.42/647,388.80
  6. Step 6: Final answer
    x = 518,355.82

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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.