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Finding the Fourth Proportional to 1,007.36, 1,390.32 and 692.36

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Solution

The fourth proportional to 1,007.36, 1,390.32 and 692.36 is: 955.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.36 : 1,390.32 = 692.36 : x
  2. Step 2: Convert to fraction form
    1,007.36/1,390.32 = 692.36/x
  3. Step 3: Cross multiply
    1,007.36x = 1,390.32 × 692.36
  4. Step 4: Simplify right side
    1,007.36x = 962,601.96
  5. Step 5: Solve for x
    x = 962,601.96/1,007.36
  6. Step 6: Final answer
    x = 955.57

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1.5x scale

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.