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Finding the Fourth Proportional to 1,783.12, 2,658.72 and 1,780.68

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Solution

The fourth proportional to 1,783.12, 2,658.72 and 1,780.68 is: 2,655.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.12 : 2,658.72 = 1,780.68 : x
  2. Step 2: Convert to fraction form
    1,783.12/2,658.72 = 1,780.68/x
  3. Step 3: Cross multiply
    1,783.12x = 2,658.72 × 1,780.68
  4. Step 4: Simplify right side
    1,783.12x = 4,734,329.53
  5. Step 5: Solve for x
    x = 4,734,329.53/1,783.12
  6. Step 6: Final answer
    x = 2,655.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.