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Finding the Fourth Proportional to 759.72, 1,048.86 and 715.98

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Solution

The fourth proportional to 759.72, 1,048.86 and 715.98 is: 988.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.72 : 1,048.86 = 715.98 : x
  2. Step 2: Convert to fraction form
    759.72/1,048.86 = 715.98/x
  3. Step 3: Cross multiply
    759.72x = 1,048.86 × 715.98
  4. Step 4: Simplify right side
    759.72x = 750,962.78
  5. Step 5: Solve for x
    x = 750,962.78/759.72
  6. Step 6: Final answer
    x = 988.47

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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.