Home / 418,981.16-628,473.03-103,438.10

Finding the Fourth Proportional to 418,981.16, 628,473.03 and 103,438.10

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Solution

The fourth proportional to 418,981.16, 628,473.03 and 103,438.10 is: 155,157.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,981.16 : 628,473.03 = 103,438.10 : x
  2. Step 2: Convert to fraction form
    418,981.16/628,473.03 = 103,438.10/x
  3. Step 3: Cross multiply
    418,981.16x = 628,473.03 × 103,438.10
  4. Step 4: Simplify right side
    418,981.16x = 65,008,052,464.89
  5. Step 5: Solve for x
    x = 65,008,052,464.89/418,981.16
  6. Step 6: Final answer
    x = 155,157.46

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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.