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Finding the Fourth Proportional to 290.35, 432.14 and 289.45

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Solution

The fourth proportional to 290.35, 432.14 and 289.45 is: 430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.35 : 432.14 = 289.45 : x
  2. Step 2: Convert to fraction form
    290.35/432.14 = 289.45/x
  3. Step 3: Cross multiply
    290.35x = 432.14 × 289.45
  4. Step 4: Simplify right side
    290.35x = 125,082.92
  5. Step 5: Solve for x
    x = 125,082.92/290.35
  6. Step 6: Final answer
    x = 430.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.