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Finding the Fourth Proportional to 4,980.86, 7,470.54 and 1,860.47

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Solution

The fourth proportional to 4,980.86, 7,470.54 and 1,860.47 is: 2,790.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,980.86 : 7,470.54 = 1,860.47 : x
  2. Step 2: Convert to fraction form
    4,980.86/7,470.54 = 1,860.47/x
  3. Step 3: Cross multiply
    4,980.86x = 7,470.54 × 1,860.47
  4. Step 4: Simplify right side
    4,980.86x = 13,898,715.55
  5. Step 5: Solve for x
    x = 13,898,715.55/4,980.86
  6. Step 6: Final answer
    x = 2,790.43

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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.