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Finding the Fourth Proportional to 660,815.74, 911,981.43 and 370,422.64

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Solution

The fourth proportional to 660,815.74, 911,981.43 and 370,422.64 is: 511,214.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,815.74 : 911,981.43 = 370,422.64 : x
  2. Step 2: Convert to fraction form
    660,815.74/911,981.43 = 370,422.64/x
  3. Step 3: Cross multiply
    660,815.74x = 911,981.43 × 370,422.64
  4. Step 4: Simplify right side
    660,815.74x = 337,818,570,071.55
  5. Step 5: Solve for x
    x = 337,818,570,071.55/660,815.74
  6. Step 6: Final answer
    x = 511,214.47

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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.