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Finding the Fourth Proportional to 521,090.88, 719,054.60 and 291,634.50

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Solution

The fourth proportional to 521,090.88, 719,054.60 and 291,634.50 is: 402,427.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,090.88 : 719,054.60 = 291,634.50 : x
  2. Step 2: Convert to fraction form
    521,090.88/719,054.60 = 291,634.50/x
  3. Step 3: Cross multiply
    521,090.88x = 719,054.60 × 291,634.50
  4. Step 4: Simplify right side
    521,090.88x = 209,701,128,743.70
  5. Step 5: Solve for x
    x = 209,701,128,743.70/521,090.88
  6. Step 6: Final answer
    x = 402,427.17

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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.