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Finding the Fourth Proportional to 611,712.06, 917,577.32 and 212,365.53

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Solution

The fourth proportional to 611,712.06, 917,577.32 and 212,365.53 is: 318,551.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,712.06 : 917,577.32 = 212,365.53 : x
  2. Step 2: Convert to fraction form
    611,712.06/917,577.32 = 212,365.53/x
  3. Step 3: Cross multiply
    611,712.06x = 917,577.32 × 212,365.53
  4. Step 4: Simplify right side
    611,712.06x = 194,861,789,289.89
  5. Step 5: Solve for x
    x = 194,861,789,289.89/611,712.06
  6. Step 6: Final answer
    x = 318,551.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.