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Finding the Fourth Proportional to 660,695.18, 911,744.04 and 385,035.46

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Solution

The fourth proportional to 660,695.18, 911,744.04 and 385,035.46 is: 531,340.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,695.18 : 911,744.04 = 385,035.46 : x
  2. Step 2: Convert to fraction form
    660,695.18/911,744.04 = 385,035.46/x
  3. Step 3: Cross multiply
    660,695.18x = 911,744.04 × 385,035.46
  4. Step 4: Simplify right side
    660,695.18x = 351,053,785,843.66
  5. Step 5: Solve for x
    x = 351,053,785,843.66/660,695.18
  6. Step 6: Final answer
    x = 531,340.01

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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.