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Finding the Fourth Proportional to 388,612.70, 582,681.58 and 186,270.72

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Solution

The fourth proportional to 388,612.70, 582,681.58 and 186,270.72 is: 279,292.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,612.70 : 582,681.58 = 186,270.72 : x
  2. Step 2: Convert to fraction form
    388,612.70/582,681.58 = 186,270.72/x
  3. Step 3: Cross multiply
    388,612.70x = 582,681.58 × 186,270.72
  4. Step 4: Simplify right side
    388,612.70x = 108,536,517,437.34
  5. Step 5: Solve for x
    x = 108,536,517,437.34/388,612.70
  6. Step 6: Final answer
    x = 279,292.26

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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.