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Finding the Fourth Proportional to 611,382.36, 917,098.38 and 155,985.42

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Solution

The fourth proportional to 611,382.36, 917,098.38 and 155,985.42 is: 233,984.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,382.36 : 917,098.38 = 155,985.42 : x
  2. Step 2: Convert to fraction form
    611,382.36/917,098.38 = 155,985.42/x
  3. Step 3: Cross multiply
    611,382.36x = 917,098.38 × 155,985.42
  4. Step 4: Simplify right side
    611,382.36x = 143,053,975,985.62
  5. Step 5: Solve for x
    x = 143,053,975,985.62/611,382.36
  6. Step 6: Final answer
    x = 233,984.47

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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.