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Finding the Fourth Proportional to 770.12, 1,062.14 and 521.36

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Solution

The fourth proportional to 770.12, 1,062.14 and 521.36 is: 719.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.12 : 1,062.14 = 521.36 : x
  2. Step 2: Convert to fraction form
    770.12/1,062.14 = 521.36/x
  3. Step 3: Cross multiply
    770.12x = 1,062.14 × 521.36
  4. Step 4: Simplify right side
    770.12x = 553,757.31
  5. Step 5: Solve for x
    x = 553,757.31/770.12
  6. Step 6: Final answer
    x = 719.05

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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.