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Finding the Fourth Proportional to 420,673.40, 627,790.56 and 375,796.16

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Solution

The fourth proportional to 420,673.40, 627,790.56 and 375,796.16 is: 560,818.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,673.40 : 627,790.56 = 375,796.16 : x
  2. Step 2: Convert to fraction form
    420,673.40/627,790.56 = 375,796.16/x
  3. Step 3: Cross multiply
    420,673.40x = 627,790.56 × 375,796.16
  4. Step 4: Simplify right side
    420,673.40x = 235,921,281,732.25
  5. Step 5: Solve for x
    x = 235,921,281,732.25/420,673.40
  6. Step 6: Final answer
    x = 560,818.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.