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Finding the Fourth Proportional to 388,889.10, 583,771.05 and 300,534.30

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Solution

The fourth proportional to 388,889.10, 583,771.05 and 300,534.30 is: 451,139.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,889.10 : 583,771.05 = 300,534.30 : x
  2. Step 2: Convert to fraction form
    388,889.10/583,771.05 = 300,534.30/x
  3. Step 3: Cross multiply
    388,889.10x = 583,771.05 × 300,534.30
  4. Step 4: Simplify right side
    388,889.10x = 175,443,223,872.02
  5. Step 5: Solve for x
    x = 175,443,223,872.02/388,889.10
  6. Step 6: Final answer
    x = 451,139.47

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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.