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Finding the Fourth Proportional to 1,540.26, 2,307.51 and 771.30

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Solution

The fourth proportional to 1,540.26, 2,307.51 and 771.30 is: 1,155.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.26 : 2,307.51 = 771.30 : x
  2. Step 2: Convert to fraction form
    1,540.26/2,307.51 = 771.30/x
  3. Step 3: Cross multiply
    1,540.26x = 2,307.51 × 771.30
  4. Step 4: Simplify right side
    1,540.26x = 1,779,782.46
  5. Step 5: Solve for x
    x = 1,779,782.46/1,540.26
  6. Step 6: Final answer
    x = 1,155.51

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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.