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Finding the Fourth Proportional to 705.56, 1,053.29 and 613.32

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Solution

The fourth proportional to 705.56, 1,053.29 and 613.32 is: 915.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.56 : 1,053.29 = 613.32 : x
  2. Step 2: Convert to fraction form
    705.56/1,053.29 = 613.32/x
  3. Step 3: Cross multiply
    705.56x = 1,053.29 × 613.32
  4. Step 4: Simplify right side
    705.56x = 646,000.76
  5. Step 5: Solve for x
    x = 646,000.76/705.56
  6. Step 6: Final answer
    x = 915.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.