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Finding the Fourth Proportional to 705.56, 1,056.58 and 510.21

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Solution

The fourth proportional to 705.56, 1,056.58 and 510.21 is: 764.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.56 : 1,056.58 = 510.21 : x
  2. Step 2: Convert to fraction form
    705.56/1,056.58 = 510.21/x
  3. Step 3: Cross multiply
    705.56x = 1,056.58 × 510.21
  4. Step 4: Simplify right side
    705.56x = 539,076.41
  5. Step 5: Solve for x
    x = 539,076.41/705.56
  6. Step 6: Final answer
    x = 764.05

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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.