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Finding the Fourth Proportional to 1,855.35, 2,782.88 and 931.55

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Solution

The fourth proportional to 1,855.35, 2,782.88 and 931.55 is: 1,397.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.35 : 2,782.88 = 931.55 : x
  2. Step 2: Convert to fraction form
    1,855.35/2,782.88 = 931.55/x
  3. Step 3: Cross multiply
    1,855.35x = 2,782.88 × 931.55
  4. Step 4: Simplify right side
    1,855.35x = 2,592,373.29
  5. Step 5: Solve for x
    x = 2,592,373.29/1,855.35
  6. Step 6: Final answer
    x = 1,397.24

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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.