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Finding the Fourth Proportional to 403,911.80, 605,867.70 and 291,354.20

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Solution

The fourth proportional to 403,911.80, 605,867.70 and 291,354.20 is: 437,031.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,911.80 : 605,867.70 = 291,354.20 : x
  2. Step 2: Convert to fraction form
    403,911.80/605,867.70 = 291,354.20/x
  3. Step 3: Cross multiply
    403,911.80x = 605,867.70 × 291,354.20
  4. Step 4: Simplify right side
    403,911.80x = 176,522,099,039.34
  5. Step 5: Solve for x
    x = 176,522,099,039.34/403,911.80
  6. Step 6: Final answer
    x = 437,031.30

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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.