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Finding the Fourth Proportional to 403,780.10, 605,670.15 and 123,260.90

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Solution

The fourth proportional to 403,780.10, 605,670.15 and 123,260.90 is: 184,891.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,780.10 : 605,670.15 = 123,260.90 : x
  2. Step 2: Convert to fraction form
    403,780.10/605,670.15 = 123,260.90/x
  3. Step 3: Cross multiply
    403,780.10x = 605,670.15 × 123,260.90
  4. Step 4: Simplify right side
    403,780.10x = 74,655,447,792.14
  5. Step 5: Solve for x
    x = 74,655,447,792.14/403,780.10
  6. Step 6: Final answer
    x = 184,891.35

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1.5x scale

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.