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Finding the Fourth Proportional to 403,489.40, 605,234.10 and 108,001.40

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Solution

The fourth proportional to 403,489.40, 605,234.10 and 108,001.40 is: 162,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,489.40 : 605,234.10 = 108,001.40 : x
  2. Step 2: Convert to fraction form
    403,489.40/605,234.10 = 108,001.40/x
  3. Step 3: Cross multiply
    403,489.40x = 605,234.10 × 108,001.40
  4. Step 4: Simplify right side
    403,489.40x = 65,366,130,127.74
  5. Step 5: Solve for x
    x = 65,366,130,127.74/403,489.40
  6. Step 6: Final answer
    x = 162,002.10

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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.