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Finding the Fourth Proportional to 721,495.19, 995,573.35 and 399,160.55

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Solution

The fourth proportional to 721,495.19, 995,573.35 and 399,160.55 is: 550,791.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,495.19 : 995,573.35 = 399,160.55 : x
  2. Step 2: Convert to fraction form
    721,495.19/995,573.35 = 399,160.55/x
  3. Step 3: Cross multiply
    721,495.19x = 995,573.35 × 399,160.55
  4. Step 4: Simplify right side
    721,495.19x = 397,393,605,951.34
  5. Step 5: Solve for x
    x = 397,393,605,951.34/721,495.19
  6. Step 6: Final answer
    x = 550,791.76

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1.5x scale

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.