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Finding the Fourth Proportional to 521,393.36, 719,355.54 and 291,916.84

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Solution

The fourth proportional to 521,393.36, 719,355.54 and 291,916.84 is: 402,751.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,393.36 : 719,355.54 = 291,916.84 : x
  2. Step 2: Convert to fraction form
    521,393.36/719,355.54 = 291,916.84/x
  3. Step 3: Cross multiply
    521,393.36x = 719,355.54 × 291,916.84
  4. Step 4: Simplify right side
    521,393.36x = 209,991,996,073.29
  5. Step 5: Solve for x
    x = 209,991,996,073.29/521,393.36
  6. Step 6: Final answer
    x = 402,751.57

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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.