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Finding the Fourth Proportional to 403,019.40, 604,529.10 and 340,811.40

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Solution

The fourth proportional to 403,019.40, 604,529.10 and 340,811.40 is: 511,217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,019.40 : 604,529.10 = 340,811.40 : x
  2. Step 2: Convert to fraction form
    403,019.40/604,529.10 = 340,811.40/x
  3. Step 3: Cross multiply
    403,019.40x = 604,529.10 × 340,811.40
  4. Step 4: Simplify right side
    403,019.40x = 206,030,408,911.74
  5. Step 5: Solve for x
    x = 206,030,408,911.74/403,019.40
  6. Step 6: Final answer
    x = 511,217.10

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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.