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Finding the Fourth Proportional to 418,980.41, 628,471.90 and 103,437.35

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Solution

The fourth proportional to 418,980.41, 628,471.90 and 103,437.35 is: 155,156.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,980.41 : 628,471.90 = 103,437.35 : x
  2. Step 2: Convert to fraction form
    418,980.41/628,471.90 = 103,437.35/x
  3. Step 3: Cross multiply
    418,980.41x = 628,471.90 × 103,437.35
  4. Step 4: Simplify right side
    418,980.41x = 65,007,464,743.11
  5. Step 5: Solve for x
    x = 65,007,464,743.11/418,980.41
  6. Step 6: Final answer
    x = 155,156.34

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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.