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Finding the Fourth Proportional to 631,892.34, 872,028.18 and 377,390.34

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Solution

The fourth proportional to 631,892.34, 872,028.18 and 377,390.34 is: 520,808.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,892.34 : 872,028.18 = 377,390.34 : x
  2. Step 2: Convert to fraction form
    631,892.34/872,028.18 = 377,390.34/x
  3. Step 3: Cross multiply
    631,892.34x = 872,028.18 × 377,390.34
  4. Step 4: Simplify right side
    631,892.34x = 329,095,011,339.78
  5. Step 5: Solve for x
    x = 329,095,011,339.78/631,892.34
  6. Step 6: Final answer
    x = 520,808.67

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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.