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Finding the Fourth Proportional to 743.09, 1,108.06 and 692.83

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Solution

The fourth proportional to 743.09, 1,108.06 and 692.83 is: 1,033.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.09 : 1,108.06 = 692.83 : x
  2. Step 2: Convert to fraction form
    743.09/1,108.06 = 692.83/x
  3. Step 3: Cross multiply
    743.09x = 1,108.06 × 692.83
  4. Step 4: Simplify right side
    743.09x = 767,688.21
  5. Step 5: Solve for x
    x = 767,688.21/743.09
  6. Step 6: Final answer
    x = 1,033.10

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1.5x scale

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.