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Finding the Fourth Proportional to 710.32, 1,065.84 and 705.28

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Solution

The fourth proportional to 710.32, 1,065.84 and 705.28 is: 1,058.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.32 : 1,065.84 = 705.28 : x
  2. Step 2: Convert to fraction form
    710.32/1,065.84 = 705.28/x
  3. Step 3: Cross multiply
    710.32x = 1,065.84 × 705.28
  4. Step 4: Simplify right side
    710.32x = 751,715.64
  5. Step 5: Solve for x
    x = 751,715.64/710.32
  6. Step 6: Final answer
    x = 1,058.28

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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.