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Finding the Fourth Proportional to 662,140.57, 913,690.77 and 371,685.64

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Solution

The fourth proportional to 662,140.57, 913,690.77 and 371,685.64 is: 512,890.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,140.57 : 913,690.77 = 371,685.64 : x
  2. Step 2: Convert to fraction form
    662,140.57/913,690.77 = 371,685.64/x
  3. Step 3: Cross multiply
    662,140.57x = 913,690.77 × 371,685.64
  4. Step 4: Simplify right side
    662,140.57x = 339,605,738,609.54
  5. Step 5: Solve for x
    x = 339,605,738,609.54/662,140.57
  6. Step 6: Final answer
    x = 512,890.70

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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.