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Finding the Fourth Proportional to 853,696.88, 1,178,323.06 and 491,157.88

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Solution

The fourth proportional to 853,696.88, 1,178,323.06 and 491,157.88 is: 677,925.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,696.88 : 1,178,323.06 = 491,157.88 : x
  2. Step 2: Convert to fraction form
    853,696.88/1,178,323.06 = 491,157.88/x
  3. Step 3: Cross multiply
    853,696.88x = 1,178,323.06 × 491,157.88
  4. Step 4: Simplify right side
    853,696.88x = 578,742,656,104.71
  5. Step 5: Solve for x
    x = 578,742,656,104.71/853,696.88
  6. Step 6: Final answer
    x = 677,925.23

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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.