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Finding the Fourth Proportional to 864.68, 1,295.65 and 692.45

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Solution

The fourth proportional to 864.68, 1,295.65 and 692.45 is: 1,037.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.68 : 1,295.65 = 692.45 : x
  2. Step 2: Convert to fraction form
    864.68/1,295.65 = 692.45/x
  3. Step 3: Cross multiply
    864.68x = 1,295.65 × 692.45
  4. Step 4: Simplify right side
    864.68x = 897,168.19
  5. Step 5: Solve for x
    x = 897,168.19/864.68
  6. Step 6: Final answer
    x = 1,037.58

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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.