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Finding the Fourth Proportional to 642,756.87, 964,144.83 and 243,290.39

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Solution

The fourth proportional to 642,756.87, 964,144.83 and 243,290.39 is: 364,939.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,756.87 : 964,144.83 = 243,290.39 : x
  2. Step 2: Convert to fraction form
    642,756.87/964,144.83 = 243,290.39/x
  3. Step 3: Cross multiply
    642,756.87x = 964,144.83 × 243,290.39
  4. Step 4: Simplify right side
    642,756.87x = 234,567,171,707.18
  5. Step 5: Solve for x
    x = 234,567,171,707.18/642,756.87
  6. Step 6: Final answer
    x = 364,939.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.