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Finding the Fourth Proportional to 521,388.63, 719,841.33 and 400,288.77

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Solution

The fourth proportional to 521,388.63, 719,841.33 and 400,288.77 is: 552,648.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,388.63 : 719,841.33 = 400,288.77 : x
  2. Step 2: Convert to fraction form
    521,388.63/719,841.33 = 400,288.77/x
  3. Step 3: Cross multiply
    521,388.63x = 719,841.33 × 400,288.77
  4. Step 4: Simplify right side
    521,388.63x = 288,144,400,580.86
  5. Step 5: Solve for x
    x = 288,144,400,580.86/521,388.63
  6. Step 6: Final answer
    x = 552,648.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.