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Finding the Fourth Proportional to 612,092.20, 918,138.30 and 470,374.60

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Solution

The fourth proportional to 612,092.20, 918,138.30 and 470,374.60 is: 705,561.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,092.20 : 918,138.30 = 470,374.60 : x
  2. Step 2: Convert to fraction form
    612,092.20/918,138.30 = 470,374.60/x
  3. Step 3: Cross multiply
    612,092.20x = 918,138.30 × 470,374.60
  4. Step 4: Simplify right side
    612,092.20x = 431,868,935,607.18
  5. Step 5: Solve for x
    x = 431,868,935,607.18/612,092.20
  6. Step 6: Final answer
    x = 705,561.90

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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.