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Finding the Fourth Proportional to 403,758.60, 605,637.90 and 254,459.40

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Solution

The fourth proportional to 403,758.60, 605,637.90 and 254,459.40 is: 381,689.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,758.60 : 605,637.90 = 254,459.40 : x
  2. Step 2: Convert to fraction form
    403,758.60/605,637.90 = 254,459.40/x
  3. Step 3: Cross multiply
    403,758.60x = 605,637.90 × 254,459.40
  4. Step 4: Simplify right side
    403,758.60x = 154,110,256,651.26
  5. Step 5: Solve for x
    x = 154,110,256,651.26/403,758.60
  6. Step 6: Final answer
    x = 381,689.10

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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.