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Finding the Fourth Proportional to 660,484.88, 911,748.16 and 445,915.58

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Solution

The fourth proportional to 660,484.88, 911,748.16 and 445,915.58 is: 615,551.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,484.88 : 911,748.16 = 445,915.58 : x
  2. Step 2: Convert to fraction form
    660,484.88/911,748.16 = 445,915.58/x
  3. Step 3: Cross multiply
    660,484.88x = 911,748.16 × 445,915.58
  4. Step 4: Simplify right side
    660,484.88x = 406,562,709,580.33
  5. Step 5: Solve for x
    x = 406,562,709,580.33/660,484.88
  6. Step 6: Final answer
    x = 615,551.88

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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.