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Finding the Fourth Proportional to 403,389.40, 605,084.10 and 348,093.40

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Solution

The fourth proportional to 403,389.40, 605,084.10 and 348,093.40 is: 522,140.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,389.40 : 605,084.10 = 348,093.40 : x
  2. Step 2: Convert to fraction form
    403,389.40/605,084.10 = 348,093.40/x
  3. Step 3: Cross multiply
    403,389.40x = 605,084.10 × 348,093.40
  4. Step 4: Simplify right side
    403,389.40x = 210,625,781,654.94
  5. Step 5: Solve for x
    x = 210,625,781,654.94/403,389.40
  6. Step 6: Final answer
    x = 522,140.10

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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.