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Finding the Fourth Proportional to 521,390.13, 719,843.40 and 400,290.27

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Solution

The fourth proportional to 521,390.13, 719,843.40 and 400,290.27 is: 552,650.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,390.13 : 719,843.40 = 400,290.27 : x
  2. Step 2: Convert to fraction form
    521,390.13/719,843.40 = 400,290.27/x
  3. Step 3: Cross multiply
    521,390.13x = 719,843.40 × 400,290.27
  4. Step 4: Simplify right side
    521,390.13x = 288,146,308,943.72
  5. Step 5: Solve for x
    x = 288,146,308,943.72/521,390.13
  6. Step 6: Final answer
    x = 552,650.10

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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.