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Finding the Fourth Proportional to 718,538.78, 991,597.88 and 464,332.84

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Solution

The fourth proportional to 718,538.78, 991,597.88 and 464,332.84 is: 640,788.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,538.78 : 991,597.88 = 464,332.84 : x
  2. Step 2: Convert to fraction form
    718,538.78/991,597.88 = 464,332.84/x
  3. Step 3: Cross multiply
    718,538.78x = 991,597.88 × 464,332.84
  4. Step 4: Simplify right side
    718,538.78x = 460,431,458,440.22
  5. Step 5: Solve for x
    x = 460,431,458,440.22/718,538.78
  6. Step 6: Final answer
    x = 640,788.60

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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.