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Finding the Fourth Proportional to 1,214.07, 1,675.68 and 771.88

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Solution

The fourth proportional to 1,214.07, 1,675.68 and 771.88 is: 1,065.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.07 : 1,675.68 = 771.88 : x
  2. Step 2: Convert to fraction form
    1,214.07/1,675.68 = 771.88/x
  3. Step 3: Cross multiply
    1,214.07x = 1,675.68 × 771.88
  4. Step 4: Simplify right side
    1,214.07x = 1,293,420.02
  5. Step 5: Solve for x
    x = 1,293,420.02/1,214.07
  6. Step 6: Final answer
    x = 1,065.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.