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Finding the Fourth Proportional to 612,159.49, 918,404.46 and 212,822.38

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Solution

The fourth proportional to 612,159.49, 918,404.46 and 212,822.38 is: 319,291.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,159.49 : 918,404.46 = 212,822.38 : x
  2. Step 2: Convert to fraction form
    612,159.49/918,404.46 = 212,822.38/x
  3. Step 3: Cross multiply
    612,159.49x = 918,404.46 × 212,822.38
  4. Step 4: Simplify right side
    612,159.49x = 195,457,022,979.82
  5. Step 5: Solve for x
    x = 195,457,022,979.82/612,159.49
  6. Step 6: Final answer
    x = 319,291.01

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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.