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Finding the Fourth Proportional to 530.42, 793.85 and 399.60

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Solution

The fourth proportional to 530.42, 793.85 and 399.60 is: 598.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.42 : 793.85 = 399.60 : x
  2. Step 2: Convert to fraction form
    530.42/793.85 = 399.60/x
  3. Step 3: Cross multiply
    530.42x = 793.85 × 399.60
  4. Step 4: Simplify right side
    530.42x = 317,220.46
  5. Step 5: Solve for x
    x = 317,220.46/530.42
  6. Step 6: Final answer
    x = 598.06

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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.