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Finding the Fourth Proportional to 611,741.69, 917,807.54 and 256,660.37

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Solution

The fourth proportional to 611,741.69, 917,807.54 and 256,660.37 is: 385,072.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,741.69 : 917,807.54 = 256,660.37 : x
  2. Step 2: Convert to fraction form
    611,741.69/917,807.54 = 256,660.37/x
  3. Step 3: Cross multiply
    611,741.69x = 917,807.54 × 256,660.37
  4. Step 4: Simplify right side
    611,741.69x = 235,564,822,805.19
  5. Step 5: Solve for x
    x = 235,564,822,805.19/611,741.69
  6. Step 6: Final answer
    x = 385,072.37

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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.