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Finding the Fourth Proportional to 392,007.80, 588,011.70 and 155,271.80

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Solution

The fourth proportional to 392,007.80, 588,011.70 and 155,271.80 is: 232,907.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,007.80 : 588,011.70 = 155,271.80 : x
  2. Step 2: Convert to fraction form
    392,007.80/588,011.70 = 155,271.80/x
  3. Step 3: Cross multiply
    392,007.80x = 588,011.70 × 155,271.80
  4. Step 4: Simplify right side
    392,007.80x = 91,301,635,080.06
  5. Step 5: Solve for x
    x = 91,301,635,080.06/392,007.80
  6. Step 6: Final answer
    x = 232,907.70

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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.