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Finding the Fourth Proportional to 612,412.88, 918,123.64 and 191,472.08

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Solution

The fourth proportional to 612,412.88, 918,123.64 and 191,472.08 is: 287,053.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,412.88 : 918,123.64 = 191,472.08 : x
  2. Step 2: Convert to fraction form
    612,412.88/918,123.64 = 191,472.08/x
  3. Step 3: Cross multiply
    612,412.88x = 918,123.64 × 191,472.08
  4. Step 4: Simplify right side
    612,412.88x = 175,795,043,047.97
  5. Step 5: Solve for x
    x = 175,795,043,047.97/612,412.88
  6. Step 6: Final answer
    x = 287,053.14

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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.