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Finding the Fourth Proportional to 545,706.89, 753,098.20 and 303,989.40

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Solution

The fourth proportional to 545,706.89, 753,098.20 and 303,989.40 is: 419,518.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,706.89 : 753,098.20 = 303,989.40 : x
  2. Step 2: Convert to fraction form
    545,706.89/753,098.20 = 303,989.40/x
  3. Step 3: Cross multiply
    545,706.89x = 753,098.20 × 303,989.40
  4. Step 4: Simplify right side
    545,706.89x = 228,933,869,959.08
  5. Step 5: Solve for x
    x = 228,933,869,959.08/545,706.89
  6. Step 6: Final answer
    x = 419,518.01

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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.