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Finding the Fourth Proportional to 526.75, 790.14 and 389.39

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Solution

The fourth proportional to 526.75, 790.14 and 389.39 is: 584.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.75 : 790.14 = 389.39 : x
  2. Step 2: Convert to fraction form
    526.75/790.14 = 389.39/x
  3. Step 3: Cross multiply
    526.75x = 790.14 × 389.39
  4. Step 4: Simplify right side
    526.75x = 307,670.12
  5. Step 5: Solve for x
    x = 307,670.12/526.75
  6. Step 6: Final answer
    x = 584.09

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Similar ratio
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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.