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Finding the Fourth Proportional to 612,607.62, 918,311.49 and 342,867.48

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Solution

The fourth proportional to 612,607.62, 918,311.49 and 342,867.48 is: 513,965.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,607.62 : 918,311.49 = 342,867.48 : x
  2. Step 2: Convert to fraction form
    612,607.62/918,311.49 = 342,867.48/x
  3. Step 3: Cross multiply
    612,607.62x = 918,311.49 × 342,867.48
  4. Step 4: Simplify right side
    612,607.62x = 314,859,146,431.35
  5. Step 5: Solve for x
    x = 314,859,146,431.35/612,607.62
  6. Step 6: Final answer
    x = 513,965.44

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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.