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Finding the Fourth Proportional to 500.50, 753.52 and 391.40

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Solution

The fourth proportional to 500.50, 753.52 and 391.40 is: 589.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.50 : 753.52 = 391.40 : x
  2. Step 2: Convert to fraction form
    500.50/753.52 = 391.40/x
  3. Step 3: Cross multiply
    500.50x = 753.52 × 391.40
  4. Step 4: Simplify right side
    500.50x = 294,926.54
  5. Step 5: Solve for x
    x = 294,926.54/500.50
  6. Step 6: Final answer
    x = 589.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.