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Finding the Fourth Proportional to 392,681.40, 589,265.10 and 155,999.40

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Solution

The fourth proportional to 392,681.40, 589,265.10 and 155,999.40 is: 234,095.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,681.40 : 589,265.10 = 155,999.40 : x
  2. Step 2: Convert to fraction form
    392,681.40/589,265.10 = 155,999.40/x
  3. Step 3: Cross multiply
    392,681.40x = 589,265.10 × 155,999.40
  4. Step 4: Simplify right side
    392,681.40x = 91,925,002,040.94
  5. Step 5: Solve for x
    x = 91,925,002,040.94/392,681.40
  6. Step 6: Final answer
    x = 234,095.64

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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.