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Finding the Fourth Proportional to 7,390.88, 10,200.40 and 4,406.78

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Solution

The fourth proportional to 7,390.88, 10,200.40 and 4,406.78 is: 6,081.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,390.88 : 10,200.40 = 4,406.78 : x
  2. Step 2: Convert to fraction form
    7,390.88/10,200.40 = 4,406.78/x
  3. Step 3: Cross multiply
    7,390.88x = 10,200.40 × 4,406.78
  4. Step 4: Simplify right side
    7,390.88x = 44,950,918.71
  5. Step 5: Solve for x
    x = 44,950,918.71/7,390.88
  6. Step 6: Final answer
    x = 6,081.94

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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.