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Finding the Fourth Proportional to 660,146.69, 911,016.92 and 402,035.74

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Solution

The fourth proportional to 660,146.69, 911,016.92 and 402,035.74 is: 554,818.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,146.69 : 911,016.92 = 402,035.74 : x
  2. Step 2: Convert to fraction form
    660,146.69/911,016.92 = 402,035.74/x
  3. Step 3: Cross multiply
    660,146.69x = 911,016.92 × 402,035.74
  4. Step 4: Simplify right side
    660,146.69x = 366,261,361,584.72
  5. Step 5: Solve for x
    x = 366,261,361,584.72/660,146.69
  6. Step 6: Final answer
    x = 554,818.14

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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.