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Finding the Fourth Proportional to 399,007.80, 598,511.70 and 162,520.20

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Solution

The fourth proportional to 399,007.80, 598,511.70 and 162,520.20 is: 243,780.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,007.80 : 598,511.70 = 162,520.20 : x
  2. Step 2: Convert to fraction form
    399,007.80/598,511.70 = 162,520.20/x
  3. Step 3: Cross multiply
    399,007.80x = 598,511.70 × 162,520.20
  4. Step 4: Simplify right side
    399,007.80x = 97,270,241,186.34
  5. Step 5: Solve for x
    x = 97,270,241,186.34/399,007.80
  6. Step 6: Final answer
    x = 243,780.30

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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.