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Finding the Fourth Proportional to 392,710.07, 589,032.20 and 155,989.19

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Solution

The fourth proportional to 392,710.07, 589,032.20 and 155,989.19 is: 233,970.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,710.07 : 589,032.20 = 155,989.19 : x
  2. Step 2: Convert to fraction form
    392,710.07/589,032.20 = 155,989.19/x
  3. Step 3: Cross multiply
    392,710.07x = 589,032.20 × 155,989.19
  4. Step 4: Simplify right side
    392,710.07x = 91,882,657,624.47
  5. Step 5: Solve for x
    x = 91,882,657,624.47/392,710.07
  6. Step 6: Final answer
    x = 233,970.72

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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.