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Finding the Fourth Proportional to 611,683.20, 917,087.40 and 274,447.80

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Solution

The fourth proportional to 611,683.20, 917,087.40 and 274,447.80 is: 411,475.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,683.20 : 917,087.40 = 274,447.80 : x
  2. Step 2: Convert to fraction form
    611,683.20/917,087.40 = 274,447.80/x
  3. Step 3: Cross multiply
    611,683.20x = 917,087.40 × 274,447.80
  4. Step 4: Simplify right side
    611,683.20x = 251,692,619,337.72
  5. Step 5: Solve for x
    x = 251,692,619,337.72/611,683.20
  6. Step 6: Final answer
    x = 411,475.45

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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.