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Finding the Fourth Proportional to 874.50, 1,206.84 and 525.42

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Solution

The fourth proportional to 874.50, 1,206.84 and 525.42 is: 725.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.50 : 1,206.84 = 525.42 : x
  2. Step 2: Convert to fraction form
    874.50/1,206.84 = 525.42/x
  3. Step 3: Cross multiply
    874.50x = 1,206.84 × 525.42
  4. Step 4: Simplify right side
    874.50x = 634,097.87
  5. Step 5: Solve for x
    x = 634,097.87/874.50
  6. Step 6: Final answer
    x = 725.10

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Double scale
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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.