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Finding the Fourth Proportional to 521,745.30, 781,451.55 and 510,081.30

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Solution

The fourth proportional to 521,745.30, 781,451.55 and 510,081.30 is: 763,981.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,745.30 : 781,451.55 = 510,081.30 : x
  2. Step 2: Convert to fraction form
    521,745.30/781,451.55 = 510,081.30/x
  3. Step 3: Cross multiply
    521,745.30x = 781,451.55 × 510,081.30
  4. Step 4: Simplify right side
    521,745.30x = 398,603,822,511.02
  5. Step 5: Solve for x
    x = 398,603,822,511.02/521,745.30
  6. Step 6: Final answer
    x = 763,981.63

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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.