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Finding the Fourth Proportional to 758.50, 1,048.38 and 669.35

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Solution

The fourth proportional to 758.50, 1,048.38 and 669.35 is: 925.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.50 : 1,048.38 = 669.35 : x
  2. Step 2: Convert to fraction form
    758.50/1,048.38 = 669.35/x
  3. Step 3: Cross multiply
    758.50x = 1,048.38 × 669.35
  4. Step 4: Simplify right side
    758.50x = 701,727.37
  5. Step 5: Solve for x
    x = 701,727.37/758.50
  6. Step 6: Final answer
    x = 925.15

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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.