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Finding the Fourth Proportional to 612,007.76, 918,141.24 and 191,315.36

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Solution

The fourth proportional to 612,007.76, 918,141.24 and 191,315.36 is: 287,013.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,007.76 : 918,141.24 = 191,315.36 : x
  2. Step 2: Convert to fraction form
    612,007.76/918,141.24 = 191,315.36/x
  3. Step 3: Cross multiply
    612,007.76x = 918,141.24 × 191,315.36
  4. Step 4: Simplify right side
    612,007.76x = 175,654,521,861.45
  5. Step 5: Solve for x
    x = 175,654,521,861.45/612,007.76
  6. Step 6: Final answer
    x = 287,013.55

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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.