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Finding the Fourth Proportional to 521,574.20, 782,361.30 and 403,330.40

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Solution

The fourth proportional to 521,574.20, 782,361.30 and 403,330.40 is: 604,995.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,574.20 : 782,361.30 = 403,330.40 : x
  2. Step 2: Convert to fraction form
    521,574.20/782,361.30 = 403,330.40/x
  3. Step 3: Cross multiply
    521,574.20x = 782,361.30 × 403,330.40
  4. Step 4: Simplify right side
    521,574.20x = 315,550,096,073.52
  5. Step 5: Solve for x
    x = 315,550,096,073.52/521,574.20
  6. Step 6: Final answer
    x = 604,995.60

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Similar ratio
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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.