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Finding the Fourth Proportional to 612,802.10, 918,907.89 and 213,434.03

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Solution

The fourth proportional to 612,802.10, 918,907.89 and 213,434.03 is: 320,048.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,802.10 : 918,907.89 = 213,434.03 : x
  2. Step 2: Convert to fraction form
    612,802.10/918,907.89 = 213,434.03/x
  3. Step 3: Cross multiply
    612,802.10x = 918,907.89 × 213,434.03
  4. Step 4: Simplify right side
    612,802.10x = 196,126,214,161.50
  5. Step 5: Solve for x
    x = 196,126,214,161.50/612,802.10
  6. Step 6: Final answer
    x = 320,048.21

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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.