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Finding the Fourth Proportional to 418,437.72, 627,621 and 165,649.50

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Solution

The fourth proportional to 418,437.72, 627,621 and 165,649.50 is: 248,460.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,437.72 : 627,621 = 165,649.50 : x
  2. Step 2: Convert to fraction form
    418,437.72/627,621 = 165,649.50/x
  3. Step 3: Cross multiply
    418,437.72x = 627,621 × 165,649.50
  4. Step 4: Simplify right side
    418,437.72x = 103,965,104,839.50
  5. Step 5: Solve for x
    x = 103,965,104,839.50/418,437.72
  6. Step 6: Final answer
    x = 248,460.16

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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.