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Finding the Fourth Proportional to 2,730.90, 4,095.80 and 782.58

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Solution

The fourth proportional to 2,730.90, 4,095.80 and 782.58 is: 1,173.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,730.90 : 4,095.80 = 782.58 : x
  2. Step 2: Convert to fraction form
    2,730.90/4,095.80 = 782.58/x
  3. Step 3: Cross multiply
    2,730.90x = 4,095.80 × 782.58
  4. Step 4: Simplify right side
    2,730.90x = 3,205,291.16
  5. Step 5: Solve for x
    x = 3,205,291.16/2,730.90
  6. Step 6: Final answer
    x = 1,173.71

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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.