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Finding the Fourth Proportional to 1,164.15, 1,607.90 and 770.49

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Solution

The fourth proportional to 1,164.15, 1,607.90 and 770.49 is: 1,064.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.15 : 1,607.90 = 770.49 : x
  2. Step 2: Convert to fraction form
    1,164.15/1,607.90 = 770.49/x
  3. Step 3: Cross multiply
    1,164.15x = 1,607.90 × 770.49
  4. Step 4: Simplify right side
    1,164.15x = 1,238,867.02
  5. Step 5: Solve for x
    x = 1,238,867.02/1,164.15
  6. Step 6: Final answer
    x = 1,064.18

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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.