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Finding the Fourth Proportional to 660,145.69, 911,015.54 and 402,034.74

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Solution

The fourth proportional to 660,145.69, 911,015.54 and 402,034.74 is: 554,816.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,145.69 : 911,015.54 = 402,034.74 : x
  2. Step 2: Convert to fraction form
    660,145.69/911,015.54 = 402,034.74/x
  3. Step 3: Cross multiply
    660,145.69x = 911,015.54 × 402,034.74
  4. Step 4: Simplify right side
    660,145.69x = 366,259,889,194.61
  5. Step 5: Solve for x
    x = 366,259,889,194.61/660,145.69
  6. Step 6: Final answer
    x = 554,816.75

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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.