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Finding the Fourth Proportional to 691.50, 1,037.25 and 652.98

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Solution

The fourth proportional to 691.50, 1,037.25 and 652.98 is: 979.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.50 : 1,037.25 = 652.98 : x
  2. Step 2: Convert to fraction form
    691.50/1,037.25 = 652.98/x
  3. Step 3: Cross multiply
    691.50x = 1,037.25 × 652.98
  4. Step 4: Simplify right side
    691.50x = 677,303.51
  5. Step 5: Solve for x
    x = 677,303.51/691.50
  6. Step 6: Final answer
    x = 979.47

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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.