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Finding the Fourth Proportional to 1,235.34, 1,703.70 and 903.69

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Solution

The fourth proportional to 1,235.34, 1,703.70 and 903.69 is: 1,246.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.34 : 1,703.70 = 903.69 : x
  2. Step 2: Convert to fraction form
    1,235.34/1,703.70 = 903.69/x
  3. Step 3: Cross multiply
    1,235.34x = 1,703.70 × 903.69
  4. Step 4: Simplify right side
    1,235.34x = 1,539,616.65
  5. Step 5: Solve for x
    x = 1,539,616.65/1,235.34
  6. Step 6: Final answer
    x = 1,246.31

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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.