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Finding the Fourth Proportional to 611,376.85, 917,090.13 and 155,979.92

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Solution

The fourth proportional to 611,376.85, 917,090.13 and 155,979.92 is: 233,976.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,376.85 : 917,090.13 = 155,979.92 : x
  2. Step 2: Convert to fraction form
    611,376.85/917,090.13 = 155,979.92/x
  3. Step 3: Cross multiply
    611,376.85x = 917,090.13 × 155,979.92
  4. Step 4: Simplify right side
    611,376.85x = 143,047,642,817.46
  5. Step 5: Solve for x
    x = 143,047,642,817.46/611,376.85
  6. Step 6: Final answer
    x = 233,976.22

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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.