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Finding the Fourth Proportional to 592.38, 817.08 and 390.38

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Solution

The fourth proportional to 592.38, 817.08 and 390.38 is: 538.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    592.38 : 817.08 = 390.38 : x
  2. Step 2: Convert to fraction form
    592.38/817.08 = 390.38/x
  3. Step 3: Cross multiply
    592.38x = 817.08 × 390.38
  4. Step 4: Simplify right side
    592.38x = 318,971.69
  5. Step 5: Solve for x
    x = 318,971.69/592.38
  6. Step 6: Final answer
    x = 538.46

Related Problems

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Half scale
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Double scale
Find fourth proportional to 593.38, 818.46 and 391.38
Similar ratio
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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.