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Finding the Fourth Proportional to 660,505.92, 911,730.72 and 392,232

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Solution

The fourth proportional to 660,505.92, 911,730.72 and 392,232 is: 541,418.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,505.92 : 911,730.72 = 392,232 : x
  2. Step 2: Convert to fraction form
    660,505.92/911,730.72 = 392,232/x
  3. Step 3: Cross multiply
    660,505.92x = 911,730.72 × 392,232
  4. Step 4: Simplify right side
    660,505.92x = 357,609,963,767.04
  5. Step 5: Solve for x
    x = 357,609,963,767.04/660,505.92
  6. Step 6: Final answer
    x = 541,418.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.