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Finding the Fourth Proportional to 4,853.54, 7,280.29 and 1,390.79

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Solution

The fourth proportional to 4,853.54, 7,280.29 and 1,390.79 is: 2,086.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,853.54 : 7,280.29 = 1,390.79 : x
  2. Step 2: Convert to fraction form
    4,853.54/7,280.29 = 1,390.79/x
  3. Step 3: Cross multiply
    4,853.54x = 7,280.29 × 1,390.79
  4. Step 4: Simplify right side
    4,853.54x = 10,125,354.53
  5. Step 5: Solve for x
    x = 10,125,354.53/4,853.54
  6. Step 6: Final answer
    x = 2,086.18

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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.