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Finding the Fourth Proportional to 928.99, 1,393.49 and 373.96

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Solution

The fourth proportional to 928.99, 1,393.49 and 373.96 is: 560.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.99 : 1,393.49 = 373.96 : x
  2. Step 2: Convert to fraction form
    928.99/1,393.49 = 373.96/x
  3. Step 3: Cross multiply
    928.99x = 1,393.49 × 373.96
  4. Step 4: Simplify right side
    928.99x = 521,109.52
  5. Step 5: Solve for x
    x = 521,109.52/928.99
  6. Step 6: Final answer
    x = 560.94

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Double scale
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1.5x scale

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.