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Finding the Fourth Proportional to 521,703.30, 783,138.15 and 403,896.90

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Solution

The fourth proportional to 521,703.30, 783,138.15 and 403,896.90 is: 606,296.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,703.30 : 783,138.15 = 403,896.90 : x
  2. Step 2: Convert to fraction form
    521,703.30/783,138.15 = 403,896.90/x
  3. Step 3: Cross multiply
    521,703.30x = 783,138.15 × 403,896.90
  4. Step 4: Simplify right side
    521,703.30x = 316,307,071,056.74
  5. Step 5: Solve for x
    x = 316,307,071,056.74/521,703.30
  6. Step 6: Final answer
    x = 606,296.86

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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.